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PCI MSI: Unmask MSI if setup failed

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The initial state of mask register of MSI is unmasked.  We set it
masked before calling arch_setup_msi_irqs().  If arch_setup_msi_irq()
fails, it is better to restore the state of the mask register.

Reviewed-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Hidetoshi Seto 2009-06-23 17:39:27 +09:00 committed by Jesse Barnes
parent 2c21fd4b33
commit 7ba1930db0
1 changed files with 1 additions and 0 deletions
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drivers/pci/msi.c
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@ -383,6 +383,7 @@ static int msi_capability_init(struct pci_dev *dev, int nvec)
/* Configure MSI capability structure */
ret = arch_setup_msi_irqs(dev, nvec, PCI_CAP_ID_MSI);
if (ret) {
msi_mask_irq(entry, mask, ~mask);
msi_free_irqs(dev);
return ret;
}