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[ACPI] fix run-time error checking in acpi_pci_irq_disable() 

The 'bus' field in pci_dev structure should be checked before calling
pci_read_config_byte() because pci_bus_read_config_byte() called by
pci_read_config_byte() refers to 'bus' field.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Kenji Kaneshige 2005-09-03 00:34:32 -04:00 committed by Len Brown
parent 8713cbefaf
commit 5f0110f2a7
1 changed files with 1 additions and 4 deletions
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5
drivers/acpi/pci_irq.c
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@ -500,7 +500,7 @@ void acpi_pci_irq_disable(struct pci_dev *dev)
ACPI_FUNCTION_TRACE("acpi_pci_irq_disable");
if (!dev)
if (!dev || !dev->bus)
return_VOID;
pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
@ -508,9 +508,6 @@ void acpi_pci_irq_disable(struct pci_dev *dev)
return_VOID;
pin--;
if (!dev->bus)
return_VOID;
/*
* First we check the PCI IRQ routing table (PRT) for an IRQ.
*/