diff options
| -rw-r--r-- | block/blk-core.c | 16 | ||||
| -rw-r--r-- | block/blk-settings.c | 7 |
2 files changed, 15 insertions, 8 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 3cc17e6064d6..bc2b7c5004e1 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -446,6 +446,11 @@ void blk_put_queue(struct request_queue *q) kobject_put(&q->kobj); } +/* + * Note: If a driver supplied the queue lock, it should not zap that lock + * unexpectedly as some queue cleanup components like elevator_exit() and + * blk_throtl_exit() need queue lock. + */ void blk_cleanup_queue(struct request_queue *q) { /* @@ -540,6 +545,12 @@ struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id) mutex_init(&q->sysfs_lock); spin_lock_init(&q->__queue_lock); + /* + * By default initialize queue_lock to internal lock and driver can + * override it later if need be. + */ + q->queue_lock = &q->__queue_lock; + return q; } EXPORT_SYMBOL(blk_alloc_queue_node); @@ -624,7 +635,10 @@ blk_init_allocated_queue_node(struct request_queue *q, request_fn_proc *rfn, q->unprep_rq_fn = NULL; q->unplug_fn = generic_unplug_device; q->queue_flags = QUEUE_FLAG_DEFAULT; - q->queue_lock = lock; + + /* Override internal queue lock with supplied lock pointer */ + if (lock) + q->queue_lock = lock; /* * This also sets hw/phys segments, boundary and size diff --git a/block/blk-settings.c b/block/blk-settings.c index 36c8c1f2af18..df649fa59ded 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -176,13 +176,6 @@ void blk_queue_make_request(struct request_queue *q, make_request_fn *mfn) blk_queue_max_hw_sectors(q, BLK_SAFE_MAX_SECTORS); /* - * If the caller didn't supply a lock, fall back to our embedded - * per-queue locks - */ - if (!q->queue_lock) - q->queue_lock = &q->__queue_lock; - - /* * by default assume old behaviour and bounce for any highmem page */ blk_queue_bounce_limit(q, BLK_BOUNCE_HIGH); |