linux-kernel - [PATCH v2 2/2] intel-iommu: Fix get_domain_for

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Message-ID: <20110216204005.2979.51224.stgit@s20.home>
Date:	Wed, 16 Feb 2011 13:40:08 -0700
From:	Alex Williamson <alex.williamson@...hat.com>
To:	dwmw2@...radead.org, iommu@...ts.linux-foundation.org
Cc:	alex.williamson@...hat.com, linux-kernel@...r.kernel.org,
	linux-pci@...r.kernel.org, ddutile@...hat.com, chrisw@...hat.com
Subject: [PATCH v2 2/2] intel-iommu: Fix get_domain_for_dev() error path

If we run out of domain_ids and fail iommu_attach_domain(), we
fall into domain_exit() without having setup enough of the
domain structure for this to do anything useful.  In fact, it
typically runs off into the weeds walking the bogus domain->devices
list.  Just free the domain.

Signed-off-by: Alex Williamson <alex.williamson@...hat.com>
---

 drivers/pci/intel-iommu.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index b670b06..b0343d1 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -1835,7 +1835,7 @@ static struct dmar_domain *get_domain_for_dev(struct pci_dev *pdev, int gaw)
 
 	ret = iommu_attach_domain(domain, iommu);
 	if (ret) {
-		domain_exit(domain);
+		free_domain_mem(domain);
 		goto error;
 	}
 

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