iommu/amd: Fix boot warning when device 00:00.0 is not iommu covered

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commit 38e45d02ea upstream.

The setup code for the performance counters in the AMD IOMMU driver
tests whether the counters can be written. It tests to setup a counter
for device 00:00.0, which fails on systems where this particular device
is not covered by the IOMMU.

Fix this by not relying on device 00:00.0 but only on the IOMMU being
present.

Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Suravee Suthikulpanit 2016-02-23 13:03:30 +01:00 • committed by Greg Kroah-Hartman

parent ad0f9dade9

commit 44792d5c90

1 changed files with 22 additions and 12 deletions

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drivers/iommu/amd_iommu_init.c

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