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authorDolev Raviv <draviv@codeaurora.org>2014-07-01 12:22:37 +0300
committerChristoph Hellwig <hch@lst.de>2014-07-25 17:17:01 -0400
commite9d501b154ff62030670f7a210ed00d4cc2cae26 (patch)
tree939a814fa231dc2566f90374350f24b44af34842 /Documentation/metag
parent4264fd613a6a4b9c1c91d9291653d0fdaf4fd288 (diff)
ufs: read door bell register after clearing interrupt aggregation
In interrupt context, after reading and comparing the UTRLDBR to hba->outstanding_request and before resetting the interrupt aggregation, there might be completion of another transfer request (TR). Such TRs might get stuck, pending, until the next interrupt is generated (if any). Changing the sequence of resetting the interrupt aggregation first and then reading UTRLDBR status, will assure that completed TRs won't get stuck pending. Signed-off-by: Dolev Raviv <draviv@codeaurora.org> Signed-off-by: Christoph Hellwig <hch@lst.de>
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