[PATCH] PC300 pci_enable_device fix

Call pci_enable_device() before looking at IRQ and resources,
and pci_disable_device() when shutting the interface down.

The driver requires this fix or the "pci=routeirq" workaround
on 2.6.10 and later kernels.

Reported and tested by Artur Lipowski. 

From: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 12 insertions, 10 deletions

diff --git a/drivers/net/wan/pc300_drv.c b/drivers/net/wan/pc300_drv.c
index d67be2587d4d..3e7753b10717 100644
--- a/drivers/net/wan/pc300_drv.c
+++ b/drivers/net/wan/pc300_drv.c
@@ -3427,7 +3427,7 @@ cpc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 {
         static int first_time = 1;
         ucchar cpc_rev_id;
-        int err = 0, eeprom_outdated = 0;
+        int err, eeprom_outdated = 0;
         ucshort device_id;
         pc300_t *card;
 
@@ -3439,15 +3439,21 @@ cpc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 #endif
         }
 
+        if ((err = pci_enable_device(pdev)) < 0)
+                return err;
+
         card = (pc300_t *) kmalloc(sizeof(pc300_t), GFP_KERNEL);
         if (card == NULL) {
                 printk("PC300 found at RAM 0x%08lx, "
                        "but could not allocate card structure.\n",
                        pci_resource_start(pdev, 3));
-                return -ENOMEM;
+                err = -ENOMEM;
+                goto err_disable_dev;
         }
         memset(card, 0, sizeof(pc300_t));
 
+        err = -ENODEV;
+
         /* read PCI configuration area */
         device_id = ent->device;
         card->hw.irq = pdev->irq;
@@ -3507,7 +3513,6 @@ cpc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
                 printk("PC300 found at RAM 0x%08x, "
                        "but could not allocate PLX mem region.\n",
                        card->hw.ramphys);
-                err = -ENODEV;
                 goto err_release_io;
         }
         if (!request_mem_region(card->hw.ramphys, card->hw.alloc_ramsize,
@@ -3515,7 +3520,6 @@ cpc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
                 printk("PC300 found at RAM 0x%08x, "
                        "but could not allocate RAM mem region.\n",
                        card->hw.ramphys);
-                err = -ENODEV;
                 goto err_release_plx;
         }
         if (!request_mem_region(card->hw.scaphys, card->hw.scasize,
@@ -3523,13 +3527,9 @@ cpc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
                 printk("PC300 found at RAM 0x%08x, "
                        "but could not allocate SCA mem region.\n",
                        card->hw.ramphys);
-                err = -ENODEV;
                 goto err_release_ram;
         }
 
-        if ((err = pci_enable_device(pdev)) != 0)
-                goto err_release_sca;
-
         card->hw.plxbase = ioremap(card->hw.plxphys, card->hw.plxsize);
         card->hw.rambase = ioremap(card->hw.ramphys, card->hw.alloc_ramsize);
         card->hw.scabase = ioremap(card->hw.scaphys, card->hw.scasize);
@@ -3619,7 +3619,6 @@ err_io_unmap:
                 iounmap(card->hw.falcbase);
                 release_mem_region(card->hw.falcphys, card->hw.falcsize);
         }
-err_release_sca:
         release_mem_region(card->hw.scaphys, card->hw.scasize);
 err_release_ram:
         release_mem_region(card->hw.ramphys, card->hw.alloc_ramsize);
@@ -3628,7 +3627,9 @@ err_release_plx:
 err_release_io:
         release_region(card->hw.iophys, card->hw.iosize);
         kfree(card);
-        return -ENODEV;
+err_disable_dev:
+        pci_disable_device(pdev);
+        return err;
 }
 
 static void __devexit cpc_remove_one(struct pci_dev *pdev)
@@ -3662,6 +3663,7 @@ static void __devexit cpc_remove_one(struct pci_dev *pdev)
                 if (card->hw.irq)
                         free_irq(card->hw.irq, card);
                 kfree(card);
+                pci_disable_device(pdev);
         }
 }