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-rw-r--r--arch/x86/kernel/quirks.c18
1 files changed, 11 insertions, 7 deletions
diff --git a/arch/x86/kernel/quirks.c b/arch/x86/kernel/quirks.c
index 26ee48a33dc..04ee1e2e4c0 100644
--- a/arch/x86/kernel/quirks.c
+++ b/arch/x86/kernel/quirks.c
@@ -354,18 +354,22 @@ static void ati_force_hpet_resume(void)
static u32 ati_ixp4x0_rev(struct pci_dev *dev)
{
- u32 d;
- u8 b;
+ int err = 0;
+ u32 d = 0;
+ u8 b = 0;
- pci_read_config_byte(dev, 0xac, &b);
+ err = pci_read_config_byte(dev, 0xac, &b);
b &= ~(1<<5);
- pci_write_config_byte(dev, 0xac, b);
- pci_read_config_dword(dev, 0x70, &d);
+ err |= pci_write_config_byte(dev, 0xac, b);
+ err |= pci_read_config_dword(dev, 0x70, &d);
d |= 1<<8;
- pci_write_config_dword(dev, 0x70, d);
- pci_read_config_dword(dev, 0x8, &d);
+ err |= pci_write_config_dword(dev, 0x70, d);
+ err |= pci_read_config_dword(dev, 0x8, &d);
d &= 0xff;
dev_printk(KERN_DEBUG, &dev->dev, "SB4X0 revision 0x%x\n", d);
+
+ WARN_ON_ONCE(err);
+
return d;
}