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authorSergei Shtylyov <sshtylyov@ru.mvista.com>2010-05-11 11:08:03 +0400
committerDavid S. Miller <davem@davemloft.net>2010-05-11 11:08:03 +0400
commita9ddabc52ce3757a4331d6c1e8bf4065333cc51b (patch)
tree3ed67e857fe0b729aed9b466ea5827e9c8e0114a /drivers/ide/cmd640.c
parentf693be4d8a00431b53a59d74aefdb3f7ae92f662 (diff)
downloadlinux-a9ddabc52ce3757a4331d6c1e8bf4065333cc51b.tar.xz
cmd640: fix kernel oops in test_irq() method
When implementing the test_iqr() method, I forgot that this driver is not an ordinary PCI driver and also needs to support VLB variant of the chip. Moreover, 'hwif->dev' should be NULL, potentially causing oops in pci_read_config_byte(). Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/ide/cmd640.c')
-rw-r--r--drivers/ide/cmd640.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/ide/cmd640.c b/drivers/ide/cmd640.c
index d2b8b272bc27..cb10201a15ed 100644
--- a/drivers/ide/cmd640.c
+++ b/drivers/ide/cmd640.c
@@ -633,12 +633,10 @@ static void __init cmd640_init_dev(ide_drive_t *drive)
static int cmd640_test_irq(ide_hwif_t *hwif)
{
- struct pci_dev *dev = to_pci_dev(hwif->dev);
int irq_reg = hwif->channel ? ARTTIM23 : CFR;
- u8 irq_stat, irq_mask = hwif->channel ? ARTTIM23_IDE23INTR :
+ u8 irq_mask = hwif->channel ? ARTTIM23_IDE23INTR :
CFR_IDE01INTR;
-
- pci_read_config_byte(dev, irq_reg, &irq_stat);
+ u8 irq_stat = get_cmd640_reg(irq_reg);
return (irq_stat & irq_mask) ? 1 : 0;
}