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authorJoerg Roedel <joro@8bytes.org>2013-04-18 17:55:04 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-06-07 12:49:48 -0700
commit52462d2f5a520ce96c3ea028d80594375adca04b (patch)
tree721e31a4275ab027dd8e821527f995a4e6a9005d /arch/x86/um/sys_call_table_32.c
parenta5d3e60fa23aa401a2f14ed58af32405c9915351 (diff)
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iommu/amd: Workaround for ERBT1312
commit d3263bc29706e42f74d8800807c2dedf320d77f1 upstream. Work around an IOMMU hardware bug where clearing the EVT_INT or PPR_INT bit in the status register may race with the hardware trying to set it again. When not handled the bit might not be cleared and we lose all future event or ppr interrupts. Reported-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Signed-off-by: Joerg Roedel <joro@8bytes.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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