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PCI/MSI: skip calling pci_find_capability from msi_set_mask_bits

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The position of MSI capability is already cached in the msi_desc when
we enter the msi_set_mask_bits().  Use it instead.

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Hidetoshi Seto 2008-05-19 13:48:17 +09:00 committed by Jesse Barnes
parent cf35e4ad57
commit 5ca5c02f0e
1 changed files with 8 additions and 4 deletions
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12
drivers/pci/msi.c
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@ -70,12 +70,10 @@ arch_teardown_msi_irqs(struct pci_dev *dev)
}
}
static void msi_set_enable(struct pci_dev *dev, int enable)
static void __msi_set_enable(struct pci_dev *dev, int pos, int enable)
{
int pos;
u16 control;
pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
if (pos) {
pci_read_config_word(dev, pos + PCI_MSI_FLAGS, &control);
control &= ~PCI_MSI_FLAGS_ENABLE;
@ -85,6 +83,11 @@ static void msi_set_enable(struct pci_dev *dev, int enable)
}
}
static void msi_set_enable(struct pci_dev *dev, int enable)
{
__msi_set_enable(dev, pci_find_capability(dev, PCI_CAP_ID_MSI), enable);
}
static void msix_set_enable(struct pci_dev *dev, int enable)
{
int pos;
@ -141,7 +144,8 @@ static void msi_set_mask_bits(unsigned int irq, u32 mask, u32 flag)
mask_bits |= flag & mask;
pci_write_config_dword(entry->dev, pos, mask_bits);
} else {
msi_set_enable(entry->dev, !flag);
__msi_set_enable(entry->dev, entry->msi_attrib.pos,
!flag);
}
break;
case PCI_CAP_ID_MSIX: