From: Alex Williamson Date: Thu, 3 Jul 2014 15:51:43 +0000 (-0600) Subject: iommu/vt-d: Update to use PCI DMA aliases X-Git-Tag: omap-for-v3.17/fixes-against-rc2~158^2~16^2~8 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=579305f75d34429d11e7eeeee9d9e45000a988d3;p=pandora-kernel.git iommu/vt-d: Update to use PCI DMA aliases VT-d code currently makes use of pci_find_upstream_pcie_bridge() in order to find the topology based alias of a device. This function has a few problems. First, it doesn't check the entire alias path of the device to the root bus, therefore if a PCIe device is masked upstream, the wrong result is produced. Also, it's known to get confused and give up when it crosses a bridge from a conventional PCI bus to a PCIe bus that lacks a PCIe capability. The PCI-core provided DMA alias support solves both of these problems and additionally adds support for DMA function quirks allowing VT-d to work with devices like Marvell and Ricoh with known broken requester IDs. Signed-off-by: Alex Williamson Cc: David Woodhouse Signed-off-by: Joerg Roedel --- Reading git-diff-tree failed