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alpha: clean up unnecessary MSI/MSI-X capability find

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PCI core will initialize device MSI/MSI-X capability in
pci_msi_init_pci_dev(). So device driver should use
pci_dev->msi_cap/msix_cap to determine whether the device
support MSI/MSI-X instead of using
pci_find_capability(pci_dev, PCI_CAP_ID_MSI/MSIX).
Access to PCIe device config space again will consume more time.

Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Acked-by: Matt Turner <mattst88@gmail.com>
Cc: Phil Carmody <pc+lkml@asdf.org>
Cc: linux-alpha@vger.kernel.org
Signed-off-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Yijing Wang 2013-08-08 21:13:54 +08:00 committed by Matt Turner
parent a8b253b9f2
commit ebdd117e5a
1 changed files with 1 additions and 1 deletions
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2
arch/alpha/kernel/sys_marvel.c
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@ -331,7 +331,7 @@ marvel_map_irq(const struct pci_dev *cdev, u8 slot, u8 pin)
pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &intline);
irq = intline;
msi_loc = pci_find_capability(dev, PCI_CAP_ID_MSI);
msi_loc = dev->msi_cap;
msg_ctl = 0;
if (msi_loc)
pci_read_config_word(dev, msi_loc + PCI_MSI_FLAGS, &msg_ctl);