diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/i386/kernel/quirks.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/arch/i386/kernel/quirks.c b/arch/i386/kernel/quirks.c index aaf89cb2bc5..87ccdac8492 100644 --- a/arch/i386/kernel/quirks.c +++ b/arch/i386/kernel/quirks.c @@ -25,8 +25,7 @@ static void __devinit quirk_intel_irqbalance(struct pci_dev *dev) /* enable access to config space*/ pci_read_config_byte(dev, 0xf4, &config); - config |= 0x2; - pci_write_config_byte(dev, 0xf4, config); + pci_write_config_byte(dev, 0xf4, config|0x2); /* read xTPR register */ raw_pci_ops->read(0, 0, 0x40, 0x4c, 2, &word); @@ -42,9 +41,9 @@ static void __devinit quirk_intel_irqbalance(struct pci_dev *dev) #endif } - config &= ~0x2; - /* disable access to config space*/ - pci_write_config_byte(dev, 0xf4, config); + /* put back the original value for config space*/ + if (!(config & 0x2)) + pci_write_config_byte(dev, 0xf4, config); } DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7320_MCH, quirk_intel_irqbalance); DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7525_MCH, quirk_intel_irqbalance); |