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authorChristoph Hellwig <hch@lst.de>2014-09-16 23:44:07 +0200
committerJens Axboe <axboe@fb.com>2014-09-22 19:55:19 +0200
commita57a178a490345c7236b0077b3de005754389ed6 (patch)
tree7d5fa8c1c9df7a70e367f78297545c253c890926 /Documentation/hwmon/lm92
parentblk-mq: Avoid race condition with uninitialized requests (diff)
downloadlinux-a57a178a490345c7236b0077b3de005754389ed6.tar.xz
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blk-mq: avoid infinite recursion with the FUA flag
We should not insert requests into the flush state machine from blk_mq_insert_request. All incoming flush requests come through blk_{m,s}q_make_request and are handled there, while blk_execute_rq_nowait should only be called for BLOCK_PC requests. All other callers deal with requests that already went through the flush statemchine and shouldn't be reinserted into it. Reported-by: Robert Elliott <Elliott@hp.com> Debugged-by: Ming Lei <ming.lei@canonical.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
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