linux-kernel - [PATCH] pci: dmar/intr_remapping/iov use physfn to search drhd

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Date:	Tue, 04 Aug 2009 08:57:11 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Suresh Siddha <suresh.b.siddha@...el.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-pci@...r.kernel.org, Yu Zhao <yu.zhao@...el.com>
Subject: [PATCH] pci: dmar/intr_remapping/iov use physfn to search drhd


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 +++++
 2 files changed, 12 insertions(+), 1 deletion(-)

Index: linux-2.6/drivers/pci/dmar.c
===================================================================
--- linux-2.6.orig/drivers/pci/dmar.c
+++ linux-2.6/drivers/pci/dmar.c
@@ -493,6 +493,11 @@ dmar_find_matched_drhd_unit(struct pci_d
 	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,
--
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