diff options
Diffstat (limited to 'block/blk-mq.c')
| -rw-r--r-- | block/blk-mq.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index 82500641f37b..e0a804ab5420 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -1285,13 +1285,13 @@ static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio) blk_queue_bounce(q, &bio); + blk_queue_split(q, &bio, q->bio_split); + if (bio_integrity_enabled(bio) && bio_integrity_prep(bio)) { bio_io_error(bio); return BLK_QC_T_NONE; } - blk_queue_split(q, &bio, q->bio_split); - if (!is_flush_fua && !blk_queue_nomerges(q) && blk_attempt_plug_merge(q, bio, &request_count, &same_queue_rq)) return BLK_QC_T_NONE; @@ -1612,7 +1612,8 @@ static void blk_mq_exit_hctx(struct request_queue *q, { unsigned flush_start_tag = set->queue_depth; - blk_mq_tag_idle(hctx); + if (blk_mq_hw_queue_mapped(hctx)) + blk_mq_tag_idle(hctx); if (set->ops->exit_request) set->ops->exit_request(set->driver_data, @@ -1927,6 +1928,9 @@ static void blk_mq_realloc_hw_ctxs(struct blk_mq_tag_set *set, struct blk_mq_hw_ctx **hctxs = q->queue_hw_ctx; blk_mq_sysfs_unregister(q); + + /* protect against switching io scheduler */ + mutex_lock(&q->sysfs_lock); for (i = 0; i < set->nr_hw_queues; i++) { int node; @@ -1976,6 +1980,7 @@ static void blk_mq_realloc_hw_ctxs(struct blk_mq_tag_set *set, } } q->nr_hw_queues = i; + mutex_unlock(&q->sysfs_lock); blk_mq_sysfs_register(q); } |