#endif
static int sd_revalidate_disk(struct gendisk *);
+static void sd_unlock_native_capacity(struct gendisk *disk);
static int sd_probe(struct device *);
static int sd_remove(struct device *);
static void sd_shutdown(struct device *);
#endif
.media_changed = sd_media_changed,
.revalidate_disk = sd_revalidate_disk,
+ .unlock_native_capacity = sd_unlock_native_capacity,
};
static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd)
#error RC16_LEN must not be more than SD_BUF_SIZE
#endif
+#define READ_CAPACITY_RETRIES_ON_RESET 10
+
static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp,
unsigned char *buffer)
{
struct scsi_sense_hdr sshdr;
int sense_valid = 0;
int the_result;
- int retries = 3;
+ int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET;
unsigned int alignment;
unsigned long long lba;
unsigned sector_size;
* Invalid Field in CDB, just retry
* silently with RC10 */
return -EINVAL;
+ if (sense_valid &&
+ sshdr.sense_key == UNIT_ATTENTION &&
+ sshdr.asc == 0x29 && sshdr.ascq == 0x00)
+ /* Device reset might occur several times,
+ * give it one more chance */
+ if (--reset_retries > 0)
+ continue;
}
retries--;
struct scsi_sense_hdr sshdr;
int sense_valid = 0;
int the_result;
- int retries = 3;
+ int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET;
sector_t lba;
unsigned sector_size;
if (media_not_present(sdkp, &sshdr))
return -ENODEV;
- if (the_result)
+ if (the_result) {
sense_valid = scsi_sense_valid(&sshdr);
+ if (sense_valid &&
+ sshdr.sense_key == UNIT_ATTENTION &&
+ sshdr.asc == 0x29 && sshdr.ascq == 0x00)
+ /* Device reset might occur several times,
+ * give it one more chance */
+ if (--reset_retries > 0)
+ continue;
+ }
retries--;
} while (the_result && retries);
static int sd_try_rc16_first(struct scsi_device *sdp)
{
+ if (sdp->host->max_cmd_len < 16)
+ return 0;
if (sdp->scsi_level > SCSI_SPC_2)
return 1;
if (scsi_device_protection(sdp))
return 0;
}
+/**
+ * sd_unlock_native_capacity - unlock native capacity
+ * @disk: struct gendisk to set capacity for
+ *
+ * Block layer calls this function if it detects that partitions
+ * on @disk reach beyond the end of the device. If the SCSI host
+ * implements ->unlock_native_capacity() method, it's invoked to
+ * give it a chance to adjust the device capacity.
+ *
+ * CONTEXT:
+ * Defined by block layer. Might sleep.
+ */
+static void sd_unlock_native_capacity(struct gendisk *disk)
+{
+ struct scsi_device *sdev = scsi_disk(disk)->device;
+
+ if (sdev->host->hostt->unlock_native_capacity)
+ sdev->host->hostt->unlock_native_capacity(sdev);
+}
+
/**
* sd_format_disk_name - format disk name
* @prefix: name prefix - ie. "sd" for SCSI disks