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| author | Jens Axboe <axboe@fb.com> | 2017-01-26 12:22:11 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2017-01-26 12:22:11 -0700 |
| commit | 5a797e00dc93593c9915841779881b15d9856237 (patch) | |
| tree | 65a3792c4862108140b9b26271788b3fb54368a6 /block | |
| parent | 200e86b3372b51e136a382e007b6b904b1dac7e4 (diff) | |
| download | linux-0-day-5a797e00dc93593c9915841779881b15d9856237.tar.gz linux-0-day-5a797e00dc93593c9915841779881b15d9856237.tar.xz | |
blk-mq: don't lose flags passed in to blk_mq_alloc_request()
If we come in from blk_mq_alloc_requst() with NOWAIT set in flags,
we must ensure that we don't later overwrite that in
blk_mq_sched_get_request(). Initialize alloc_data->flags before
passing it in.
Reported-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-mq-sched.c | 2 | ||||
| -rw-r--r-- | block/blk-mq.c | 6 |
2 files changed, 4 insertions, 4 deletions
diff --git a/block/blk-mq-sched.c b/block/blk-mq-sched.c index d05061f27bb1f..56b92db944aeb 100644 --- a/block/blk-mq-sched.c +++ b/block/blk-mq-sched.c @@ -117,7 +117,7 @@ struct request *blk_mq_sched_get_request(struct request_queue *q, ctx = blk_mq_get_ctx(q); hctx = blk_mq_map_queue(q, ctx->cpu); - blk_mq_set_alloc_data(data, q, 0, ctx, hctx); + blk_mq_set_alloc_data(data, q, data->flags, ctx, hctx); if (e) { data->flags |= BLK_MQ_REQ_INTERNAL; diff --git a/block/blk-mq.c b/block/blk-mq.c index dcb567642db72..84d13b5cafd06 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -253,7 +253,7 @@ EXPORT_SYMBOL_GPL(__blk_mq_alloc_request); struct request *blk_mq_alloc_request(struct request_queue *q, int rw, unsigned int flags) { - struct blk_mq_alloc_data alloc_data; + struct blk_mq_alloc_data alloc_data = { .flags = flags }; struct request *rq; int ret; @@ -1382,7 +1382,7 @@ static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio) { const int is_sync = op_is_sync(bio->bi_opf); const int is_flush_fua = bio->bi_opf & (REQ_PREFLUSH | REQ_FUA); - struct blk_mq_alloc_data data; + struct blk_mq_alloc_data data = { .flags = 0 }; struct request *rq; unsigned int request_count = 0, srcu_idx; struct blk_plug *plug; @@ -1504,7 +1504,7 @@ static blk_qc_t blk_sq_make_request(struct request_queue *q, struct bio *bio) const int is_flush_fua = bio->bi_opf & (REQ_PREFLUSH | REQ_FUA); struct blk_plug *plug; unsigned int request_count = 0; - struct blk_mq_alloc_data data; + struct blk_mq_alloc_data data = { .flags = 0 }; struct request *rq; blk_qc_t cookie; unsigned int wb_acct; |