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authorJens Axboe <axboe@kernel.dk>2013-10-29 22:11:47 +0400
committerJens Axboe <axboe@kernel.dk>2013-10-29 22:11:47 +0400
commite7e245000110a7794de8f925b9edc06a9c852f80 (patch)
treec774b4b9e7d7cdb59f3b4a237fd12c4e5eb8bc60 /block/blk-timeout.c
parent92f399c72af2d8cbb9d4f60e11d0d67ca738147f (diff)
downloadlinux-e7e245000110a7794de8f925b9edc06a9c852f80.tar.xz
blk-mq: don't disallow request merges for req->special being set
For blk-mq, if a driver has requested per-request payload data to carry command structures, they are stuffed into req->special. For an old style request based driver, req->special is used for the same purpose but indicates that a per-driver request structure has been prepared for the request already. So for the old style driver, we do not merge such requests. As most/all blk-mq drivers will use the payload feature, and since we have no problem merging on these, make this check dependent on whether it's a blk-mq enabled driver or not. Reported-by: Shaohua Li <shli@fusionio.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-timeout.c')
0 files changed, 0 insertions, 0 deletions