Commit ebdd117e authored Aug 08, 2013 by Yijing Wang Committed by Matt Turner May 26, 2015

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>

parent a8b253b9

arch/alpha/kernel/sys_marvel.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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);

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