iommu/amd: use full 64-bit value in build_completion_wait()

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[ Upstream commit 94a568ce32 ]

We started using a 64 bit completion value.  Unfortunately, we only
stored the low 32-bits, so a very large completion value would never
be matched in iommu_completion_wait().

Fixes: c69d89aff3 ("iommu/amd: Use 4K page for completion wait write-back semaphore")
Signed-off-by: John Sperbeck <jsperbeck@google.com>
Link: https://lore.kernel.org/r/20220801192229.3358786-1-jsperbeck@google.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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John Sperbeck 2022-08-01 19:22:29 +00:00 • committed by Greg Kroah-Hartman

parent f7f13b8d49

commit 7c74f03a62

1 changed files with 2 additions and 1 deletions

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drivers/iommu/amd/iommu.c

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