x86: Add missing might_fault() checks to copy_{to,from}_user()
On x86-64, copy_[to|from]_user() rely on assembly routines that
never call might_fault(), making us missing various lockdep
checks.
This doesn't apply to __copy_from,to_user() that explicitly
handle these calls, neither is it a problem in x86-32 where
copy_to,from_user() rely on the "__" prefixed versions that
also call might_fault().
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Nick Piggin <npiggin@suse.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1258382538-30979-1-git-send-email-fweisbec@gmail.com>
[ v2: fix module export ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
x86: Remove unused thread_return label from switch_to()
Remove unused thread_return label from switch_to() macro on
x86-64. Since this symbol cuts into schedule(), backtrace at the
latter half of schedule() was always shown as thread_return().
x86: Don't use the strict copy checks when branch profiling is in use
The branch profiling creates very complex code for each if
statement, to the point that gcc has trouble even analyzing
something as simple as
if (count > 5)
count = 5;
This then means that causing an error on code that gcc cannot
analyze for copy_from_user() and co is not very productive.
This patch excludes the strict copy checks in the case of branch
profiling being enabled.
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <20091006070452.5e1fc119@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
x86: Add a Kconfig option to turn the copy_from_user warnings into errors
For automated testing it is useful to have the option to turn
the warnings on copy_from_user() etc checks into errors:
In function ‘copy_from_user’,
inlined from ‘fd_copyin’ at drivers/block/floppy.c:3080,
inlined from ‘fd_ioctl’ at drivers/block/floppy.c:3503:
linux/arch/x86/include/asm/uaccess_32.h:213:
error: call to ‘copy_from_user_overflow’ declared with attribute error:
copy_from_user buffer size is not provably correct
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org>
LKML-Reference: <20091002075050.4e9f7641@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Arjan van de Ven [Wed, 30 Sep 2009 11:05:23 +0000 (13:05 +0200)]
x86: Turn the copy_from_user check into an (optional) compile time warning
A previous patch added the buffer size check to copy_from_user().
One of the things learned from analyzing the result of the previous
patch is that in general, gcc is really good at proving that the
code contains sufficient security checks to not need to do a
runtime check. But that for those cases where gcc could not prove
this, there was a relatively high percentage of real security
issues.
This patch turns the case of "gcc cannot prove" into a compile time
warning, as long as a sufficiently new gcc is in use that supports
this. The objective is that these warnings will trigger developers
checking new cases out before a security hole enters a linux kernel
release.
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: James Morris <jmorris@namei.org> Cc: Jan Beulich <jbeulich@novell.com>
LKML-Reference: <20090930130523.348ae6c4@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Arjan van de Ven [Mon, 28 Sep 2009 12:21:22 +0000 (14:21 +0200)]
x86: Use __builtin_memset and __builtin_memcpy for memset/memcpy
GCC provides reasonable memset/memcpy functions itself, with __builtin_memset
and __builtin_memcpy. For the "unknown" cases, it'll fall back to our
current existing functions, but for fixed size versions it'll inline
something smart. Quite often that will be the same as we have now,
but sometimes it can do something smarter (for example, if the code
then sets the first member of a struct, it can do a shorter memset).
In addition, and this is more important, gcc knows which registers and
such are not clobbered (while for our asm version it pretty much
acts like a compiler barrier), so for various cases it can avoid reloading
values.
The effect on codesize is shown below on my typical laptop .config:
Due to some not-so-good behavior in the gcc 3.x series, this change
is only done for GCC 4.x and above.
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
LKML-Reference: <20090928142122.6fc57e9c@infradead.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Arjan van de Ven [Sat, 26 Sep 2009 12:33:01 +0000 (14:33 +0200)]
x86: Use __builtin_object_size() to validate the buffer size for copy_from_user()
gcc (4.x) supports the __builtin_object_size() builtin, which
reports the size of an object that a pointer point to, when known
at compile time. If the buffer size is not known at compile time, a
constant -1 is returned.
This patch uses this feature to add a sanity check to
copy_from_user(); if the target buffer is known to be smaller than
the copy size, the copy is aborted and a WARNing is emitted in
memory debug mode.
These extra checks compile away when the object size is not known,
or if both the buffer size and the copy length are constants.
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
LKML-Reference: <20090926143301.2c396b94@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Rusty Russell [Thu, 24 Sep 2009 08:18:44 +0000 (17:48 +0930)]
x86: Remove redundant non-NUMA topology functions
arch/x86/include/asm/topology.h declares inline fns cpu_to_node and
cpumask_of_node for !NUMA, even though they are then declared as
macros by asm-generic/topology.h, which is #included just below.
The macros (which are the same) end up being used; these functions
are just confusing.
Roland Dreier [Wed, 23 Sep 2009 22:35:35 +0000 (15:35 -0700)]
x86: Reduce verbosity of "PAT enabled" kernel message
On modern systems, the kernel prints the message
x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106
once for every CPU.
This gets kind of ridiculous on huge systems; for example, on a
64-thread system I was lucky enough to get:
dmesg| grep 'PAT enabled' | wc
64 704 5174
There is already a BUG() if non-boot CPUs have PAT capabilities
that don't match the boot CPU, so just print the message on the
boot CPU. (I kept the print after the wrmsrl() that enables PAT,
so that the log output continues to mean that the system survived
enabling PAT on the boot CPU)
Roland Dreier [Wed, 23 Sep 2009 22:33:23 +0000 (15:33 -0700)]
x86: Reduce verbosity of "TSC is reliable" message
On modern systems, the kernel prints the message
Skipping synchronization checks as TSC is reliable.
once for every non-boot CPU.
This gets kind of ridiculous on huge systems; for example, on a
64-thread system I was lucky enough to get:
$ dmesg | grep 'TSC is reliable' | wc
63 567 4221
There's no point to doing this for every CPU, since the code is
just checking the boot CPU anyway, so change this to a
printk_once() to make the message appears only once.
Signed-off-by: Roland Dreier <rolandd@cisco.com>
LKML-Reference: <adazl8l2swc.fsf@cisco.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Randy Dunlap [Mon, 21 Sep 2009 18:12:03 +0000 (11:12 -0700)]
serial core: fix new kernel-doc warnings
Fix new kernel-doc warnings in serial_core.[hc] files.
Warning(include/linux/serial_core.h:485): No description found for parameter 'uport'
Warning(include/linux/serial_core.h:485): Excess function parameter 'port' description in 'uart_handle_dcd_change'
Warning(include/linux/serial_core.h:511): No description found for parameter 'uport'
Warning(include/linux/serial_core.h:511): Excess function parameter 'port' description in 'uart_handle_cts_change'
Warning(drivers/serial/serial_core.c:2437): No description found for parameter 'uport'
Warning(drivers/serial/serial_core.c:2437): Excess function parameter 'port' description in 'uart_add_one_port'
Warning(drivers/serial/serial_core.c:2509): No description found for parameter 'uport'
Warning(drivers/serial/serial_core.c:2509): Excess function parameter 'port' description in 'uart_remove_one_port'
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* git://git.infradead.org/battery-2.6:
power_supply: Add driver for the PMU on WM831x PMICs
ds2760_battery: Fix integer overflow for time_to_empty_now
wm97xx_battery: Convert to dev_pm_ops
wm97xx_battery: Use irq to detect charger state
wm97xx_battery: Use platform_data
wm97xx-core: Pass platform_data to battery
ds2760_battery: implement set_charged() feature
power_supply: get_by_name and set_charged functionality
power_supply: EXPORT_SYMBOL cleanups
ds2760_battery: add current_accum module parameter
ds2760_battery: handle full_active_uAh == 0 case correctly
ds2760_battery: add rated_capacity module parameter
ds2760_battery: export more features
ds2760_battery: delay power supply registration
wm8350_power: Implement charge type property
power_supply: Add a charge_type property, and use it for olpc driver
olpc_battery: Add an 'error' sysfs device that displays raw errors
Revert "power: remove POWER_SUPPLY_PROP_CAPACITY_LEVEL"
Merge branch 'drm-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6
* 'drm-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
drm/radeon/r600: set correct pitch for 4 byte copy
drm/radeon: consolidate family flags used in pciids.
* git://git.infradead.org/mtd-2.6: (58 commits)
mtd: jedec_probe: add PSD4256G6V id
mtd: OneNand support for Nomadik 8815 SoC (on NHK8815 board)
mtd: nand: driver for Nomadik 8815 SoC (on NHK8815 board)
m25p80: Add Spansion S25FL129P serial flashes
jffs2: Use SLAB_HWCACHE_ALIGN for jffs2_raw_{dirent,inode} slabs
mtd: sh_flctl: register sh_flctl using platform_driver_probe()
mtd: nand: txx9ndfmc: transfer 512 byte at a time if possible
mtd: nand: fix tmio_nand ecc correction
mtd: nand: add __nand_correct_data helper function
mtd: cfi_cmdset_0002: add 0xFF intolerance for M29W128G
mtd: inftl: fix fold chain block number
mtd: jedec: fix compilation problem with I28F640C3B definition
mtd: nand: fix ECC Correction bug for SMC ordering for NDFC driver
mtd: ofpart: Check availability of reg property instead of name property
driver/Makefile: Initialize "mtd" and "spi" before "net"
mtd: omap: adding DMA mode support in nand prefetch/post-write
mtd: omap: add support for nand prefetch-read and post-write
mtd: add nand support for w90p910 (v2)
mtd: maps: add mtd-ram support to physmap_of
mtd: pxa3xx_nand: add single-bit error corrections reporting
...
* git://git.infradead.org/iommu-2.6: (23 commits)
intel-iommu: Disable PMRs after we enable translation, not before
intel-iommu: Kill DMAR_BROKEN_GFX_WA option.
intel-iommu: Fix integer wrap on 32 bit kernels
intel-iommu: Fix integer overflow in dma_pte_{clear_range,free_pagetable}()
intel-iommu: Limit DOMAIN_MAX_PFN to fit in an 'unsigned long'
intel-iommu: Fix kernel hang if interrupt remapping disabled in BIOS
intel-iommu: Disallow interrupt remapping if not all ioapics covered
intel-iommu: include linux/dmi.h to use dmi_ routines
pci/dmar: correct off-by-one error in dmar_fault()
intel-iommu: Cope with yet another BIOS screwup causing crashes
intel-iommu: iommu init error path bug fixes
intel-iommu: Mark functions with __init
USB: Work around BIOS bugs by quiescing USB controllers earlier
ia64: IOMMU passthrough mode shouldn't trigger swiotlb init
intel-iommu: make domain_add_dev_info() call domain_context_mapping()
intel-iommu: Unify hardware and software passthrough support
intel-iommu: Cope with broken HP DC7900 BIOS
iommu=pt is a valid early param
intel-iommu: double kfree()
intel-iommu: Kill pointless intel_unmap_single() function
...
Fixed up trivial include lines conflict in drivers/pci/intel-iommu.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6: (41 commits)
regulator: Add some brief design documentation
regulator: fix voltage range in da9034 ldo12
regulator/driver: be more specific in nanodoc for is_enabled
regulator/lp3971: drop unnecessary initialization
regulator: drop 'default n'
regulator: fix typos
regulator: fix calculation of voltage range in da9034_set_ldo12_voltage()
regulator: update a filename in documentation
drivers/regulator/Kconfig: fix typo (s/Usersapce/Userspace/) in REGULATOR_USERSPACE_CONSUMER description
REGULATOR Handle positive returncode from enable
regulator: tps650xx - build fixes for x86_64
Fix some regulator documentation
Regulator: Adding TPS65023 and TPS6507x in Kconfig and Makefile
Regulator: Add TPS6507x regulator driver
Regulator: Add TPS65023 regulator driver
regulator: userspace: use sysfs_create_group
regulator: Add GPIO enable control to fixed voltage regulator driver
Regulator: Implement list_voltage for pcf50633 regulator driver.
regulator: regulator_enable() permission checking
regulator: Push locking for regulator_is_enabled() out
...
Merge branch 'fix/asoc' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
* 'fix/asoc' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
ASoC: wm8753: fix mapping when MONOMIX is set to Stereo
ASoC: some minor changes for AD1836 and AD1938 codec drivers
ASoC: DaVinci: Fixes to McASP configuration
ASoC: Blackfin I2S: fix resuming when device hasn't been used
ASoC: Blackfin I2S: add lost platform_device parameter to resume function
ASoC: fix typos in Blackfin headers
ASoC: bf5xx-sport: the irq save/restore funcs take an unsigned long
ASoC: Blackfin AC97: add a few missing multichannel define handling
Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6
* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: (22 commits)
[S390] Update default configuration.
[S390] hibernate: Do real CPU swap at resume time
[S390] dasd: tolerate devices that have no feature codes
[S390] zcrypt: Do not add/remove devices in s/r callbacks
[S390] hibernate: make sure pfn_is_nosave handles lowcore pages
[S390] smp: introduce LC_ORDER and simplify lowcore handling
[S390] ptrace: use common code for simple peek/poke operations
[S390] fix disabled_wait inline assembly clobber list
[S390] Change kernel_page_present coding style.
[S390] hibernation: reset system after resume
[S390] hibernation: fix guest page hinting related crash
[S390] Get rid of init_module/delete_module compat functions.
[S390] Convert sys_execve to function with parameters.
[S390] Convert sys_clone to function with parameters.
[S390] qdio: change state of all primed input buffers
[S390] qdio: reduce per device debug messages
[S390] cio: introduce consistent subchannel scanning
[S390] cio: idset use actual number of ssids
[S390] cio: dont kfree vmalloced memory
[S390] cio: introduce css_settle
...
Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (119 commits)
ACPI: don't pass handle for fixed hardware notifications
ACPI: remove null pointer checks in deferred execution path
ACPI: simplify deferred execution path
acerhdf: additional BIOS versions
acerhdf: convert to dev_pm_ops
acerhdf: fix fan control for AOA150 model
thermal: add missing Kconfig dependency
acpi: switch /proc/acpi/{debug_layer,debug_level} to seq_file
hp-wmi: fix rfkill memory leak on unload
ACPI: remove unnecessary #ifdef CONFIG_DMI
ACPI: linux/acpi.h should not include linux/dmi.h
hwmon driver for ACPI 4.0 power meters
topstar-laptop: add new driver for hotkeys support on Topstar N01
thinkpad_acpi: fix rfkill memory leak on unload
thinkpad-acpi: report brightness events when required
thinkpad-acpi: don't poll by default any of the reserved hotkeys
thinkpad-acpi: Fix procfs hotkey reset command
thinkpad-acpi: deprecate hotkey_bios_mask
thinkpad-acpi: hotkey poll fixes
thinkpad-acpi: be more strict when detecting a ThinkPad
...
Merge branch 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging
* 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
i2c: Clearly mark ACPI drivers as such
i2c: Add driver for SMBus Control Method Interface
i2c-pnx: Correct use of request_region/request_mem_region
MAINTAINERS: Add maintainer for AT24 and PCA9564/PCA9665
i2c-piix4: Add AMD SB900 SMBus device ID
i2c/chips: Remove deprecated pcf8574 driver
i2c/chips: Remove deprecated pca9539 driver
i2c/chips: Remove deprecated pcf8575 driver
gpio/pcf857x: Copy i2c_device_id from old pcf8574 driver
i2c/scx200_acb: Provide more information on bus errors
i2c: Provide compatibility links for i2c adapters
i2c: Convert i2c adapters to bus devices
i2c: Convert i2c clients to a device type
i2c/tsl2550: Use combined SMBus transactions
i2c-taos-evm: Switch echo off to improve performance
i2c: Drop unused i2c_driver.id field
Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2: (85 commits)
ocfs2: Use buffer IO if we are appending a file.
ocfs2: add spinlock protection when dealing with lockres->purge.
dlmglue.c: add missed mlog lines
ocfs2: __ocfs2_abort() should not enable panic for local mounts
ocfs2: Add ioctl for reflink.
ocfs2: Enable refcount tree support.
ocfs2: Implement ocfs2_reflink.
ocfs2: Add preserve to reflink.
ocfs2: Create reflinked file in orphan dir.
ocfs2: Use proper parameter for some inode operation.
ocfs2: Make transaction extend more efficient.
ocfs2: Don't merge in 1st refcount ops of reflink.
ocfs2: Modify removing xattr process for refcount.
ocfs2: Add reflink support for xattr.
ocfs2: Create an xattr indexed block if needed.
ocfs2: Call refcount tree remove process properly.
ocfs2: Attach xattr clusters to refcount tree.
ocfs2: Abstract ocfs2 xattr tree extend rec iteration process.
ocfs2: Abstract the creation of xattr block.
ocfs2: Remove inode from ocfs2_xattr_bucket_get_name_value.
...
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (142 commits)
USB: Fix sysfs paths in documentation
USB: skeleton: fix coding style issues.
USB: O_NONBLOCK in read path of skeleton
USB: make usb-skeleton honor O_NONBLOCK in write path
USB: skel_read really sucks royally
USB: Add hub descriptor update hook for xHCI
USB: xhci: Support USB hubs.
USB: xhci: Set multi-TT field for LS/FS devices under hubs.
USB: xhci: Set route string for all devices.
USB: xhci: Fix command wait list handling.
USB: xhci: Change how xHCI commands are handled.
USB: xhci: Refactor input device context setup.
USB: xhci: Endpoint representation refactoring.
USB: gadget: ether needs to select CRC32
USB: fix USBTMC get_capabilities success handling
USB: fix missing error check in probing
USB: usbfs: add USBDEVFS_URB_BULK_CONTINUATION flag
USB: support for autosuspend in sierra while online
USB: ehci-dbgp,ehci: Allow dbpg to work with suspend/resume
USB: ehci-dbgp,documentation: Documentation updates for ehci-dbgp
...
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
lguest: don't force VIRTIO_F_NOTIFY_ON_EMPTY
lguest: cleanup for map_switcher()
lguest: use PGDIR_SHIFT for PAE code to allow different PAGE_OFFSET
lguest: use set_pte/set_pmd uniformly for real page table entries
lguest: move panic notifier registration to its expected place.
virtio_blk: add support for cache flush
virtio: add virtio IDs file
virtio: get rid of redundant VIRTIO_ID_9P definition
virtio: make add_buf return capacity remaining
virtio_pci: minor MSI-X cleanups
mm/nommu.c:171: error: conflicting types for `__get_user_pages'
mm/internal.h:254: error: previous declaration of `__get_user_pages' was here
make[1]: *** [mm/nommu.o] Error 1
mm/built-in.o: In function `memmap_init_zone':
(.meminit.text+0x326): undefined reference to `highest_memmap_pfn'
mm/built-in.o: In function `memmap_init_zone':
(.meminit.text+0x32d): undefined reference to `highest_memmap_pfn'
Fix both breakages, and give myself 30 lashes (ouch!)
For this system call user space passes a signed long length parameter,
while the kernel side takes an unsigned long parameter and converts it
later to signed long again.
This has led to bugs in compat wrappers see e.g. dd90bbd5 "powerpc: Add
compat_sys_truncate". The s390 compat wrapper for this functions is
broken as well since it also performs zero extension instead of sign
extension for the length parameter.
In addition if hpa comes up with an automated way of generating
compat wrappers it would generate a wrong one here.
So change the length parameter from unsigned long to long.
Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Use rdmsrl_safe() when accessing MCE registers. While in
theory we always 'know' which ones are safe to access from
the capability bits, there's a lot of hardware variations
and reality might differ from theory, as it did in this case:
http://bugzilla.kernel.org/show_bug.cgi?id=14204
[ 0.010016] mce: CPU supports 5 MCE banks
[ 0.011029] general protection fault: 0000 [#1]
[ 0.011998] last sysfs file:
[ 0.011998] Modules linked in:
[ 0.011998]
[ 0.011998] Pid: 0, comm: swapper Not tainted (2.6.31_router #1) HP Vectra
[ 0.011998] EIP: 0060:[<c100d9b9>] EFLAGS: 00010246 CPU: 0
[ 0.011998] EIP is at mce_rdmsrl+0x19/0x60
[ 0.011998] EAX: 00000000 EBX: 00000001 ECX: 00000407 EDX: 08000000
[ 0.011998] ESI: 00000000 EDI: 8c000000 EBP: 00000405 ESP: c17d5eac
So WARN_ONCE() instead of crashing the box.
( also fix a number of stylistic inconsistencies in the code. )
Note, we might still crash in wrmsrl() if we get that far, but
we shouldnt if the registers are truly inaccessible.
Merge branch 'for-linus' of git://gitserver.sunplusct.com/linux-2.6-score
* 'for-linus' of git://gitserver.sunplusct.com/linux-2.6-score:
score: update email address in MAINTAINERS.
score: Cleanup linker script using new macros.
score: Make THREAD_SIZE available to assembly files.
score: Make PAGE_SIZE available to assembly.
Merge branch 'x86/orig_ax' of git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-roland
* 'x86/orig_ax' of git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-roland:
x86: ptrace: set TS_COMPAT when 32-bit ptrace sets orig_eax>=0
x86: ptrace: do not sign-extend orig_ax on write
x86: syscall_get_nr returns int
asm-generic: syscall_get_nr returns int
Unlike on most other architectures ino_t is an unsigned int on s390. So
add an explicit cast to avoid this compile warning:
fs/ext2/namei.c: In function 'ext2_lookup':
fs/ext2/namei.c:73: warning: format '%lu' expects type 'long unsigned int', but argument 4 has type 'ino_t'
Doug Graham [Tue, 22 Sep 2009 23:48:00 +0000 (16:48 -0700)]
V3 minixfs: add missing directory type checking
There are a few places in the Minix FS code where the "inode" field of a
minix_dir_entry is used without checking first to see if the dirent is
really a minix3_dir_entry. The inode number in a V1/V2 dirent is 16 bits,
whereas that in a V3 dirent is 32 bits.
Accessing it as a 16 bit field when it really should be accessed as a 32
bit field probably kinda sorta works on a little-endian machine, but leads
to some rather odd behaviour on big-endian machines.
[akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Doug Graham <dgraham@nortel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Francisco Jerez [Tue, 22 Sep 2009 23:47:53 +0000 (16:47 -0700)]
vgacon: prevent vgacon_deinit from touching the hardware for inactive consoles.
fbcon makes the (reasonable) assumption that it only needs to program the
hardware once, when fbcon_init() is called for the foreground console.
This doesn't always play well with vgacon because vgacon_deinit() is only
doing its job when the last console it owns is closed (when switching from
vgacon to fbcon, that's usually *after* fbcon_init() has set the new
mode).
Depending on the hardware this can cause the wrong framebuffer location to
be scanned out (e.g. reproduced on nv05 with the nouveau framebuffer
driver).
Signed-off-by: Francisco Jerez <currojerez@riseup.net> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Krzysztof Helt <krzysztof.h1@poczta.fm> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Ian Armstrong [Tue, 22 Sep 2009 23:47:52 +0000 (16:47 -0700)]
fbcon: only unbind from console if successfully registered
Attempting to unload a framebuffer module calls unregister_framebuffer()
which in turn gets fbcon to release it. If fbcon has no framebuffers
linked to a console, it will also unbind itself from the console driver.
However, if fbcon never registered itself as a console driver, the unbind
will fail causing the framebuffer device entry to persist. In most cases
this failure will result in an oops when attempting to access the now
non-existent device.
This patch ensures that the fbcon unbind request will succeed even if a
bind was never done. It tracks if a successful bind ever occurred & will
only attempt to unbind if needed. If there never was a bind, it simply
returns with no error.
Signed-off-by: Ian Armstrong <ian@iarmst.demon.co.uk> Cc: Krzysztof Helt <krzysztof.h1@poczta.fm> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jean Delvare [Tue, 22 Sep 2009 23:47:50 +0000 (16:47 -0700)]
matroxfb: get rid of CONFIG_FB_MATROX_32MB
CONFIG_FB_MATROX_32MB is always enabled, so there is no point in having
ifdefs all around. And it is bad practice to use CONFIG_* as a name for
something which is not a Kconfig option.
Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Petr Vandrovec <vandrove@vc.cvut.cz> Cc: Krzysztof Helt <krzysztof.h1@poczta.fm> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jean Delvare [Tue, 22 Sep 2009 23:47:50 +0000 (16:47 -0700)]
matroxfb: get rid of unneeded macro MINFO_FROM
With multihead support always enabled, macros MINFO_FROM and
MINFO_FROM_INFO are no longer needed and make the code harder to read.
Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Petr Vandrovec <vandrove@vc.cvut.cz> Cc: Krzysztof Helt <krzysztof.h1@poczta.fm> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jean Delvare [Tue, 22 Sep 2009 23:47:49 +0000 (16:47 -0700)]
matroxfb: get rid of unneeded macros WPMINFO and friends
With multihead support always enabled, these macros are no longer needed
and make the code harder to read.
Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Petr Vandrovec <vandrove@vc.cvut.cz> Cc: Krzysztof Helt <krzysztof.h1@poczta.fm> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jean Delvare [Tue, 22 Sep 2009 23:47:48 +0000 (16:47 -0700)]
matroxfb: get rid of unneeded macros ACCESS_FBINFO and MINFO
With multihead support always enabled, these macros are no longer needed
and make the code harder to read.
Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Petr Vandrovec <vandrove@vc.cvut.cz> Cc: Krzysztof Helt <krzysztof.h1@poczta.fm> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jean Delvare [Tue, 22 Sep 2009 23:47:47 +0000 (16:47 -0700)]
matroxfb: make CONFIG_FB_MATROX_MULTIHEAD=y mandatory
I would like to get rid of option CONFIG_FB_MATROX_MULTIHEAD and just
always enable it. There are many reasons for doing this:
* CONFIG_FB_MATROX_MULTIHEAD=y is what all x86 distributions do, so it
definitely works or we would know by now.
* Building the matroxfb driver with CONFIG_FB_MATROX_MULTIHEAD not set
results in the following build warning:
drivers/video/matrox/matroxfb_crtc2.c: In function 'matroxfb_dh_open':
drivers/video/matrox/matroxfb_crtc2.c:265: warning: the address of 'matroxfb_global_mxinfo' will always evaluate as 'true'
drivers/video/matrox/matroxfb_crtc2.c: In function 'matroxfb_dh_release':
drivers/video/matrox/matroxfb_crtc2.c:285: warning: the address of 'matroxfb_global_mxinfo' will always evaluate as 'true'
This is nothing to be worried about, the driver will work fine, but build
warnings are still annoying.
* The trick to get multihead support without CONFIG_FB_MATROX_MULTIHEAD,
which is described in the config help text, no longer works: you can't
load the same kernel module more than once.
* I fail to see how CONFIG_FB_MATROX_MULTIHEAD=y would make the code
significantly slower, contrary to what the help text says. A few extra
parameters on the stack here and there can't really slow things down in
comaprison to the rest of the code, and register access.
* The driver built without CONFIG_FB_MATROX_MULTIHEAD is larger than the
driver build with CONFIG_FB_MATROX_MULTIHEAD=y by 8%.
* One less configuration option makes things simpler. We add options
all the time, being able to remove one for once is nice. It improves
testing coverage. And I don't think the Matrox adapters are still
popular enough to warrant overdetailed configuration settings.
* We should be able to unobfuscate the driver code quite a bit after
this change (patches follow.)
Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Petr Vandrovec <vandrove@vc.cvut.cz> Cc: Krzysztof Helt <krzysztof.h1@poczta.fm> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
At the moment about half of the framebuffer drivers can return an error
code in fb_set_par. Until now it would be silently ignored by fbmem.c
and fbcon.c. This patch fixes fbmem.c to return the error code and
restore var on error.
But it is not clear in which video mode the device is when fb_set_par
fails. It would be good and reasonable if it were in the old state but
there is no guarantee that this is true for all existing drivers.
Additionally print a message if a failing fb_set_par is detected in
fbmem.c or fbcon.c.
Although most errors should be caught by the previous fb_check_var some
errors can't as they are dynamic (memory allocations, ...) and can only be
detected while performing the operations which is forbidden in
fb_check_var.
This patch shouldn't have a negative impact on normal operation as all
drivers return 0 on success. The impact in case of error depends heavily
on the driver and caller but it's expected to be better than before.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Krzysztof Helt <krzysztof.h1@poczta.fm> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Ben Dooks [Tue, 22 Sep 2009 23:47:43 +0000 (16:47 -0700)]
s3c2410fb: fix clockrate calculation
In the final part of the calculation for the tft display clockrate we
divide the output pf s3c2410fb_calc_pixclk() by 2 which leaves us with a
rounding error if the result is odd.
Change to using DIV_ROUND_UP() to ensure that we always choose a higher
divisor and thus a lower frequency.
Signed-off-by: Ben Dooks <ben@simtec.co.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Use DIV_ROUND_UP explicitly instead of manual shifts and adds. It makes
the code more readable and consistent (sometimes there were shifts,
sometimes divs).
There is no change on the assembly level (compilers should do the right
job).
Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Krzysztof Helt <krzysztof.h1@poczta.fm> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fix the range check for panning. The current code fails to detect some
invalid values (very high ones that can occur if an app tries to move
further up/left than 0,0) as the check uses the unknown values for
calculation so that an overflow can occur.
To fix this it is sufficient to move the calculation to the right side to
use only trusted values.
Kai Jiang detected this problem and proposed an initial patch.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Kai Jiang <b18973@freescale.com> Cc: Krzysztof Helt <krzysztof.h1@poczta.fm> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
x = \(kmalloc\|kcalloc\|kzalloc\)(...);
... when != x == NULL
when != x != NULL
when != (x || ...)
(
kfree(x)
|
f(...,C,...,x,...)
|
*f(...,x,...)
|
*x->f
)
// </smpl>
[akpm@linux-foundation.org: convert to kstrdup() as well] Signed-off-by: Julia Lawall <julia@diku.dk> Cc: Ming Lei <tom.leiming@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The main motivation of this patch was to merge the three initialization
functions in one and clean it up. However as some changes in other code
areas where needed to do it right some small other changes were made.
Changes to viafb_par:
io_virt renamed as engine_mmio and moved to shared
VQ_start renamed as vq_vram_addr and moved to shared
VQ_end removed as it is easily recalculatable
vq_vram_addr is not strictly needed but keep it to track where we
allocated video memory. The memory allocated for the virtual queue was
shrunk to VQ_SIZE as VQ_SIZE+CURSOR_SIZE looked like a bug to me. But to
be honest I don't have the faintest idea what virtual queues are for in
the graphic hardware and whether the driver needs them in any way. I only
know that they aren't directly accessed by the driver and so the only
potential current use would be as hardware internal buffers. For now keep
them to avoid regressions and only remove the double cursor allocation.
The most changes were caused by renames and the mentioned structure
changes so the chance of regressions is pretty low. The meaning of
viafb_accel changed slightly as previously it was changed back and forth
in the code and allowed to enable the hardware acceleration by software if
previously disabled. The new behaviour is that viafb_accel=0 always
prevents hardware acceleration. With viafb_accel!=0 the acceleration can
be freely choosen by set_var. This means viafb_accel is a diagnostic tool
and if someone has to use viafb_accel=0 the driver needs to be fixed.
As this is mostly a code cleanup no regressions beside the slightly change
of viafb_accel is expected.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Scott Fang <ScottFang@viatech.com.cn> Cc: Joseph Chan <JosephChan@via.com.tw> Cc: Harald Welte <laforge@gnumonks.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Split the pitch handling up and replaces the calculation from virtual xres
and bpp with fix.line_length which already contains the pitch and does not
add any constrains for the virtual resolution.
Also add a bit to the second pitch which the documentation mentions but
which was ignored by the driver.
Although it is a bit unclear what the right pitch for some LCD modes is
this patch should have no negative runtime impact.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Scott Fang <ScottFang@viatech.com.cn> Cc: Joseph Chan <JosephChan@via.com.tw> Cc: Harald Welte <laforge@gnumonks.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The most notable change is that it no longer buffers the values in
viacursor but uses the ones in cursor instead as they are guaranteed to be
always valid.
Furthermore it uses local instead global variables where possible, moves
the cursor variable in shared as only one hardware cursor is supported and
returns an error if memory allocation fails. Last but not least it fixes
a too small buffer (as u32 has only 4 and not 32 bytes) but this did not
produce any known problems.
This is mostly a code cleanup, no negative runtime changes are expected.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Scott Fang <ScottFang@viatech.com.cn> Cc: Joseph Chan <JosephChan@via.com.tw> Cc: Harald Welte <laforge@gnumonks.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This patch is a completly rewritten 2D engine. The engine is no longer in
a default state but reinitialized every time to allow usage for both
framebuffers regardless of their settings.
The whole engine handling is concentrated in a big function which takes 16
parameters. Although the number of parameters is worryingly it is good to
have a single funtion to deal with this stuff as it allows to easily
support different engines and avoids some code duplication.
On the way support for the new 2D engine in VX800 was added. As the with
less code duplication but it is probably better to duplicate the code as
this way is easier to walk if VIA ever decides to release a new engine
which changes anything the driver touches.
The engine support for VX800 gives a notable boost in speed. There are no
known regressions but as this patch changes paths I do neither have the
hardware nor documentation to check and has the possibility to put the
system in a critical state heavy testing is appreciated.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Scott Fang <ScottFang@viatech.com.cn> Cc: Joseph Chan <JosephChan@via.com.tw> Cc: Harald Welte <laforge@gnumonks.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This patch introduces viafb_shared and is the beginning of a smooth
transition to use it.
viafb_shared should contain all general, non-surface specific data that
should be shared along all viafb framebuffers while viafb_par should only
contain things that are specific to each surface or in other words extend
fb_info. This change is intended to clean the dual/multi framebuffer
handling up.
This removes the annoyance that viafbinfo1->par points to a different
structure than viaparinfo1.
As the last change is fundamental it is difficult to ensure that all parts
of the driver do not depend on the previous brokenness but the chance of
regressions is very low.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Scott Fang <ScottFang@viatech.com.cn> Cc: Joseph Chan <JosephChan@via.com.tw> Cc: Harald Welte <laforge@gnumonks.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This removes the completly useless io variable as well as the temporary
used variables mmio_base and mmio_len in favor to use directly the fb_info
variables.
This is a code cleanup only, no runtime change expected.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Scott Fang <ScottFang@viatech.com.cn> Cc: Joseph Chan <JosephChan@via.com.tw> Cc: Harald Welte <laforge@gnumonks.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
At least for VX800 this initialization is not very good as some parts of
the register are written with reserved values. This makes the display go
white in some configurations and not usable until the framebuffer is
removed. It's better to not initialize it as it allows to use a
previously (by BIOS) correctly configured display.
This patch makes some displays work but might cause problems on others.
This is bad but can not be easily avoided. If this causes some
regressions it's probably the best to fix it in the 'active' display setup
code.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Scott Fang <ScottFang@viatech.com.cn> Cc: Joseph Chan <JosephChan@via.com.tw> Cc: Harald Welte <laforge@gnumonks.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Remove everything related to video devices from the driver as it did not
influence the driver operation. This patch does change the userspace
behaviour as it removes two IOCTLs and one module parameter. But this is
good as it removes useless stuff and helps the user to figure out the
options that do affect the driver behaviour (which are still too many).
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Scott Fang <ScottFang@viatech.com.cn> Cc: Joseph Chan <JosephChan@via.com.tw> Cc: Harald Welte <laforge@gnumonks.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Clean the handling of ioremapped video memory up. The following changes
were made:
info->screen_base - viafb_FB_MM
(VRAM offset calculation) was replaced by
info->fix.smem_start - viafbinfo->fix.smem_start
which is essentially the same calculation but done with physical instead
virtual addresses.
*->fbmem_virt
was replaced by
viafbinfo->screen_base
This is true for viafbinfo and viafbinfo1 as the par pointers are equal.
An early initialization of viafbinfo1->fix.smem* was removed as done later
in viafb_setup_fixinfo.
This patch highlights that the only usage of the ioremapped video memory
in the driver is for hardware cursor handling. Even if it has to hold the
used virtual screen mapped for old-fashioned read/write calls (vs.
mmap'ed) a lot virtual memory could be saved by only ioremapping on
demand.
Code cleanup, no runtime changes expected.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Scott Fang <ScottFang@viatech.com.cn> Cc: Joseph Chan <JosephChan@via.com.tw> Cc: Harald Welte <laforge@gnumonks.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Clean the duoview handling up by replacing the varible with the funtion in
the only place where it is used. This is a code cleanup only, no runtime
change expected.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Scott Fang <ScottFang@viatech.com.cn> Cc: Joseph Chan <JosephChan@via.com.tw> Cc: Harald Welte <laforge@gnumonks.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Remove the mode information from viafbdev.c and uses the one of viamode.c
instead. This is possible because horizontal and vertical address are the
same as horizontal and vertical resolution. The reduced blanking modes in
the table are no problem because they have a higher index than the normal
modes and therefore always the normal modes are selected just as the old
behaviour.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Scott Fang <ScottFang@viatech.com.cn> Cc: Joseph Chan <JosephChan@via.com.tw> Cc: Harald Welte <laforge@gnumonks.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Remove unneeeded declarations from the header and makes it more
maintainable by evaluating the array size in the file the array exist in
and exporting it via variables. This removes the need to keep the array
size in the header in sync with the real array size.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Scott Fang <ScottFang@viatech.com.cn> Cc: Joseph Chan <JosephChan@via.com.tw> Cc: Harald Welte <laforge@gnumonks.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Correct the returned error code for remapping the video framebuffer.
Introduce error handling for remapping MMIO register address space to
avoid a NULL pointer dereference. Disable hardware acceleration if
remapping MMIO register address space failed as those registers are only
used for hardware acceleration.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Scott Fang <ScottFang@viatech.com.cn> Cc: Joseph Chan <JosephChan@via.com.tw> Cc: Harald Welte <laforge@gnumonks.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Move individual start address setting to viafb_set_primary_address and
viafb_set_secondary_address and make it more flexible to reuse it for
panning. Using central functions makes it easier to follow HW
manipulations.
Remove crt locking as it should be only needed for timing manipulation.
Move iga_path manipulation to via_pci_probe.
Remove memset for screen cleaning as it is currently done only for the
second screen. This is not needed for normal operation but has a little
chance of causing unwanted display artifacts. This can be fixed later
more consistent and more efficient (using viafb_fillrect) if needed.
This is a code clenup, no notable runtime changes expected.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Scott Fang <ScottFang@viatech.com.cn> Cc: Joseph Chan <JosephChan@via.com.tw> Cc: Harald Welte <laforge@gnumonks.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
viafb: merge viafb_update_viafb_par in viafb_update_fix
Shrink and merge viafb_update_viafb_par. This removes a lot of duplicated
data in viafb_par. Use the relevant data of fb_info instead. On the way
it removes an inconsistency in handling a second framebuffer which only
worked because viafbinfo1->par is modified to point to the same viafb_par
as viafbinfo->par.
Code cleanup only, no runtime change expected.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Scott Fang <ScottFang@viatech.com.cn> Cc: Joseph Chan <JosephChan@via.com.tw> Cc: Harald Welte <laforge@gnumonks.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Currently the start address is set to an initial value every time
viafb_setmode is called.
This is not done consistently along graphic cores and not even the whole
address but often only parts of it. On top of that it seems useless as
the real/final address will be set by viafb_set_start_addr a few lines
later.
Remove this superfluous initalization to shrink register initalization and
as a start to decouple primary and secondary display. Code cleanup, no
notable runtime change expected.
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Scott Fang <ScottFang@viatech.com.cn> Cc: Joseph Chan <JosephChan@via.com.tw> Cc: Harald Welte <laforge@gnumonks.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Ryan Mallon [Tue, 22 Sep 2009 23:47:09 +0000 (16:47 -0700)]
ep93xx video driver
EP93xx video driver plus documentation.
Signed-off-by: Ryan Mallon <ryan@bluewatersys.com> Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Daniele Venzano <linux@brownhat.org> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Krzysztof Helt <krzysztof.h1@poczta.fm> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Ryan Mallon [Tue, 22 Sep 2009 23:47:09 +0000 (16:47 -0700)]
ep93xx video driver platform support
Signed-off-by: Ryan Mallon <ryan@bluewatersys.com> Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Daniele Venzano <linux@brownhat.org> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Krzysztof Helt <krzysztof.h1@poczta.fm> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
If called with mode_idx = 1, rate = 68, a read occurs from
sisfb_vrate[-1].refresh.
Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Cc: Krzysztof Helt <krzysztof.h1@poczta.fm> Cc: Thomas Winischhofer <thomas@winischhofer.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
davinci: fb: Frame Buffer driver for TI DA8xx/OMAP-L1xx
Add LCD controller (LCDC) driver for TI's DA8xx/OMAP-L1xx architecture.
LCDC specifications can be found at http://www.ti.com/litv/pdf/sprufm0a.
LCDC on DA8xx consists of two independent controllers, the Raster
Controller and the LCD Interface Display Driver (LIDD) controller. LIDD
further supports character and graphic displays.
This patch adds support for the graphic display (Sharp LQ035Q3DG01) found
on the DA830 based EVM. The EVM details can be found at:
http://support.spectrumdigital.com/boards/dskda830/revc/.
Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com> Signed-off-by: Pavel Kiryukhin <pkiryukhin@ru.mvista.com> Signed-off-by: Steve Chen <schen@mvista.com> Acked-by: Krzysztof Helt <krzysztof.h1@wp.pl>
DESC
davinci-fb-frame-buffer-driver-for-ti-da8xx-omap-l1xx-fix
EDESC
From: Andrew Morton <akpm@linux-foundation.org>
fix kconfig indenting
Cc: Krzysztof Helt <krzysztof.h1@wp.pl> Cc: Pavel Kiryukhin <pkiryukhin@ru.mvista.com> Cc: Steve Chen <schen@mvista.com> Cc: Sudhakar Rajashekhara <sudhakar.raj@ti.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pavel Machek [Tue, 22 Sep 2009 23:47:03 +0000 (16:47 -0700)]
fbdev: framebuffer support for HTC Dream
Add a framebuffer driver for Qualcomm MSM/QSD SoCs, tested on HTC Dream
smartphone (aka T-Mobile G1, aka ADP1).
Brian said:
I did the original quick and dirty version for bringup. Rebecca took
over and (re)wrote the bulk of the driver, getting things stable for
production ship of Dream and Sapphire, and Dima is currently adding
support for later Qualcomm chipsets (QSD8x50, etc).
Signed-off-by: Pavel Machek <pavel@ucw.cz> Cc: Brian Swetland <swetland@google.com> Cc: Krzysztof Helt <krzysztof.h1@poczta.fm> Cc: Rebecca Schultz Zavin <rebecca@android.com> Cc: Dima Zavin <dima@android.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
projects / ~andy / linux / log