PCI: Fix disable IRQ 0 in pci_reset_function()

Before initialization, dev->irq may be zero. Make sure we don't disable
it at reset time in that case.

Reviewed-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
1 file changed