Merge branch 'late/clksrc' into late/cleanup

[~andy/linux] / drivers / eisa / pci_eisa.c

diff --git a/drivers/eisa/pci_eisa.c b/drivers/eisa/pci_eisa.c
index cdae207028a720f5080b3a55c9cf63e3e7b84424..6c3fca97d346db9c6912bd3977eec99c5c7d563a 100644 (file)
--- a/drivers/eisa/pci_eisa.c
+++ b/drivers/eisa/pci_eisa.c
@@ -19,10 +19,10 @@
 /* There is only *one* pci_eisa device per machine, right ? */
 static struct eisa_root_device pci_eisa_root;
 
-static int __init pci_eisa_init(struct pci_dev *pdev,
-                               const struct pci_device_id *ent)
+static int __init pci_eisa_init(struct pci_dev *pdev)
 {
-       int rc;
+       int rc, i;
+       struct resource *res, *bus_res = NULL;
 
        if ((rc = pci_enable_device (pdev))) {
                printk (KERN_ERR "pci_eisa : Could not enable device %s\n",
@@ -30,9 +30,30 @@ static int __init pci_eisa_init(struct pci_dev *pdev,
                return rc;
        }
 
+       /*
+        * The Intel 82375 PCI-EISA bridge is a subtractive-decode PCI
+        * device, so the resources available on EISA are the same as those
+        * available on the 82375 bus.  This works the same as a PCI-PCI
+        * bridge in subtractive-decode mode (see pci_read_bridge_bases()).
+        * We assume other PCI-EISA bridges are similar.
+        *
+        * eisa_root_register() can only deal with a single io port resource,
+       *  so we use the first valid io port resource.
+        */
+       pci_bus_for_each_resource(pdev->bus, res, i)
+               if (res && (res->flags & IORESOURCE_IO)) {
+                       bus_res = res;
+                       break;
+               }
+
+       if (!bus_res) {
+               dev_err(&pdev->dev, "No resources available\n");
+               return -1;
+       }
+
        pci_eisa_root.dev              = &pdev->dev;
-       pci_eisa_root.res              = pdev->bus->resource[0];
-       pci_eisa_root.bus_base_addr    = pdev->bus->resource[0]->start;
+       pci_eisa_root.res              = bus_res;
+       pci_eisa_root.bus_base_addr    = bus_res->start;
        pci_eisa_root.slots            = EISA_MAX_SLOTS;
        pci_eisa_root.dma_mask         = pdev->dma_mask;
        dev_set_drvdata(pci_eisa_root.dev, &pci_eisa_root);
@@ -45,22 +66,26 @@ static int __init pci_eisa_init(struct pci_dev *pdev,
        return 0;
 }
 
-static struct pci_device_id pci_eisa_pci_tbl[] = {
-       { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
-         PCI_CLASS_BRIDGE_EISA << 8, 0xffff00, 0 },
-       { 0, }
-};
+/*
+ * We have to call pci_eisa_init_early() before pnpacpi_init()/isapnp_init().
+ *   Otherwise pnp resource will get enabled early and could prevent eisa
+ *   to be initialized.
+ * Also need to make sure pci_eisa_init_early() is called after
+ * x86/pci_subsys_init().
+ * So need to use subsys_initcall_sync with it.
+ */
+static int __init pci_eisa_init_early(void)
+{
+       struct pci_dev *dev = NULL;
+       int ret;
 
-static struct pci_driver __refdata pci_eisa_driver = {
-       .name           = "pci_eisa",
-       .id_table       = pci_eisa_pci_tbl,
-       .probe          = pci_eisa_init,
-};
+       for_each_pci_dev(dev)
+               if ((dev->class >> 8) == PCI_CLASS_BRIDGE_EISA) {
+                       ret = pci_eisa_init(dev);
+                       if (ret)
+                               return ret;
+               }
 
-static int __init pci_eisa_init_module (void)
-{
-       return pci_register_driver (&pci_eisa_driver);
+       return 0;
 }
-
-device_initcall(pci_eisa_init_module);
-MODULE_DEVICE_TABLE(pci, pci_eisa_pci_tbl);
+subsys_initcall_sync(pci_eisa_init_early);