ufs: read door bell register after clearing interrupt aggregation

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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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Dolev Raviv 2014-07-01 12:22:37 +03:00 • committed by Christoph Hellwig

parent 4264fd613a

commit e9d501b154

1 changed files with 34 additions and 33 deletions

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67

drivers/scsi/ufs/ufshcd.c

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