From a9ddabc52ce3757a4331d6c1e8bf4065333cc51b Mon Sep 17 00:00:00 2001 From: Sergei Shtylyov Date: Tue, 11 May 2010 00:08:03 -0700 Subject: [PATCH] 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 Signed-off-by: David S. Miller --- drivers/ide/cmd640.c | 6 ++---- 1 file 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; } -- 2.34.1