Showing error 1023

User: Jiri Slaby
Error type: Leaving function in locked state
Error type description: Some lock is not unlocked on all paths of a function, so it is leaked
File location: block/blk-core.c
Line in file: 872
Project: Linux Kernel
Project version: 2.6.28
Tools: Undetermined 1
Entered: 2012-03-04 17:07:06 UTC

Source: 

 842        rq = get_request(q, rw_flags, bio, GFP_NOIO);
 843        while (!rq) {
 844                DEFINE_WAIT(wait);
 845                struct io_context *ioc;
 846                struct request_list *rl = &q->rq;
 847
 848                prepare_to_wait_exclusive(&rl->wait[rw], &wait,
 849                                TASK_UNINTERRUPTIBLE);
 850
 851                blk_add_trace_generic(q, bio, rw, BLK_TA_SLEEPRQ);
 852
 853                __generic_unplug_device(q);
 854                spin_unlock_irq(q->queue_lock);
 855                io_schedule();
 856
 857                /*
 858                 * After sleeping, we become a "batching" process and
 859                 * will be able to allocate at least one request, and
 860                 * up to a big batch of them for a small period time.
 861                 * See ioc_batching, ioc_set_batching
 862                 */
 863                ioc = current_io_context(GFP_NOIO, q->node);
 864                ioc_set_batching(q, ioc);
 865
 866                spin_lock_irq(q->queue_lock);
 867                finish_wait(&rl->wait[rw], &wait);
 868
 869                rq = get_request(q, rw_flags, bio, GFP_NOIO);
 870        };
 871
 872        return rq;
 873}
 874
 875struct request *blk_get_request(struct request_queue *q, int rw, gfp_t gfp_mask)
 876{
 877        struct request *rq;
 878
 879        BUG_ON(rw != READ && rw != WRITE);
 880
 881        spin_lock_irq(q->queue_lock);
 882        if (gfp_mask & __GFP_WAIT) {
Show full sources
↑