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authorYijing Wang <wangyijing@huawei.com>2013-08-08 17:13:54 +0400
committerMatt Turner <mattst88@gmail.com>2015-05-26 20:01:44 +0300
commitebdd117e5aab748d06f872860f36a0b09d8aadfc (patch)
treeecd94dc5f3642e4104a1355b63834fe2cc523adf /arch/alpha
parenta8b253b9f253c05e5e10b829b8d1fb24556f4b56 (diff)
downloadlinux-ebdd117e5aab748d06f872860f36a0b09d8aadfc.tar.xz
alpha: clean up unnecessary MSI/MSI-X capability find
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>
Diffstat (limited to 'arch/alpha')
-rw-r--r--arch/alpha/kernel/sys_marvel.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/alpha/kernel/sys_marvel.c b/arch/alpha/kernel/sys_marvel.c
index f21d61fab678..24e41bd7d3c9 100644
--- a/arch/alpha/kernel/sys_marvel.c
+++ b/arch/alpha/kernel/sys_marvel.c
@@ -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);