linux-kernel - [PATCH 4/6] pci/dmar/sriov: use physfn to search drhd for VF

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Date:	Thu,  8 Apr 2010 11:58:25 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Chris Wright <chrisw@...s-sol.org>, David.Woodhouse@...el.com
Cc:	fenghua.yu@...el.com, linux-kernel@...r.kernel.org,
	linux-pci@...r.kernel.org, iommu@...ts.linux-foundation.org,
	Yinghai Lu <yinghai@...nel.org>
Subject: [PATCH 4/6] pci/dmar/sriov: use physfn to search drhd for VF

When virtfn is used, we should use physfn to find correct drhd

Signed-off-by: Yinghai Lu <yinghai@...nel.org>
---
 drivers/pci/dmar.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c
index d2f66a6..550f0a9 100644
--- a/drivers/pci/dmar.c
+++ b/drivers/pci/dmar.c
@@ -534,6 +534,11 @@ dmar_find_matched_drhd_unit(struct pci_dev *dev)
 	struct dmar_drhd_unit *dmaru = NULL;
 	struct acpi_dmar_hardware_unit *drhd;
 
+#ifdef CONFIG_PCI_IOV
+	if (dev->is_virtfn)
+		dev = dev->physfn;
+#endif
+
 	list_for_each_entry(dmaru, &dmar_drhd_units, list) {
 		drhd = container_of(dmaru->hdr,
 				    struct acpi_dmar_hardware_unit,
-- 
1.6.4.2

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