From 09ac46c429464c919d04bb737b27edd84d944f02 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Wed, 14 Dec 2011 00:33:38 +0100 Subject: block: misc updates to blk_get_queue() * blk_get_queue() is peculiar in that it returns 0 on success and 1 on failure instead of 0 / -errno or boolean. Update it such that it returns %true on success and %false on failure. * Make sure the caller checks for the return value. * Separate out __blk_get_queue() which doesn't check whether @q is dead and put it in blk.h. This will be used later. This patch doesn't introduce any functional changes. Signed-off-by: Tejun Heo Signed-off-by: Jens Axboe --- block/blk-core.c | 8 ++++---- block/blk.h | 5 +++++ block/bsg.c | 4 +--- block/genhd.c | 2 +- 4 files changed, 11 insertions(+), 8 deletions(-) (limited to 'block') diff --git a/block/blk-core.c b/block/blk-core.c index af73015..fd47493 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -626,14 +626,14 @@ blk_init_allocated_queue_node(struct request_queue *q, request_fn_proc *rfn, } EXPORT_SYMBOL(blk_init_allocated_queue_node); -int blk_get_queue(struct request_queue *q) +bool blk_get_queue(struct request_queue *q) { if (likely(!blk_queue_dead(q))) { - kobject_get(&q->kobj); - return 0; + __blk_get_queue(q); + return true; } - return 1; + return false; } EXPORT_SYMBOL(blk_get_queue); diff --git a/block/blk.h b/block/blk.h index fc3c41b..8d42115 100644 --- a/block/blk.h +++ b/block/blk.h @@ -13,6 +13,11 @@ extern struct kmem_cache *blk_requestq_cachep; extern struct kobj_type blk_queue_ktype; extern struct ida blk_queue_ida; +static inline void __blk_get_queue(struct request_queue *q) +{ + kobject_get(&q->kobj); +} + void init_request_from_bio(struct request *req, struct bio *bio); void blk_rq_bio_prep(struct request_queue *q, struct request *rq, struct bio *bio); diff --git a/block/bsg.c b/block/bsg.c index 702f131..167d586 100644 --- a/block/bsg.c +++ b/block/bsg.c @@ -769,12 +769,10 @@ static struct bsg_device *bsg_add_device(struct inode *inode, struct file *file) { struct bsg_device *bd; - int ret; #ifdef BSG_DEBUG unsigned char buf[32]; #endif - ret = blk_get_queue(rq); - if (ret) + if (!blk_get_queue(rq)) return ERR_PTR(-ENXIO); bd = bsg_alloc_device(); diff --git a/block/genhd.c b/block/genhd.c index 02e9fca..c958169 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -615,7 +615,7 @@ void add_disk(struct gendisk *disk) * Take an extra ref on queue which will be put on disk_release() * so that it sticks around as long as @disk is there. */ - WARN_ON_ONCE(blk_get_queue(disk->queue)); + WARN_ON_ONCE(!blk_get_queue(disk->queue)); retval = sysfs_create_link(&disk_to_dev(disk)->kobj, &bdi->dev->kobj, "bdi"); -- cgit v1.1