Merge branch 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvar...

[pandora-kernel.git] / block / blk-core.c

diff --git a/block/blk-core.c b/block/blk-core.c
index d2f8f40..f8cb099 100644 (file)
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -839,6 +839,9 @@ struct request *blk_get_request(struct request_queue *q, int rw, gfp_t gfp_mask)
 {
        struct request *rq;
 
+       if (unlikely(test_bit(QUEUE_FLAG_DEAD, &q->queue_flags)))
+               return NULL;
+
        BUG_ON(rw != READ && rw != WRITE);
 
        spin_lock_irq(q->queue_lock);
@@ -1279,10 +1282,8 @@ get_rq:
        init_request_from_bio(req, bio);
 
        if (test_bit(QUEUE_FLAG_SAME_COMP, &q->queue_flags) ||
-           bio_flagged(bio, BIO_CPU_AFFINE)) {
-               req->cpu = blk_cpu_to_group(get_cpu());
-               put_cpu();
-       }
+           bio_flagged(bio, BIO_CPU_AFFINE))
+               req->cpu = smp_processor_id();
 
        plug = current->plug;
        if (plug) {
@@ -1302,7 +1303,10 @@ get_rq:
                                plug->should_sort = 1;
                }
                list_add_tail(&req->queuelist, &plug->list);
+               plug->count++;
                drive_stat_acct(req, 1);
+               if (plug->count >= BLK_MAX_REQUEST_COUNT)
+                       blk_flush_plug_list(plug, false);
        } else {
                spin_lock_irq(q->queue_lock);
                add_acct_request(q, req, where);
@@ -2626,6 +2630,7 @@ void blk_start_plug(struct blk_plug *plug)
        INIT_LIST_HEAD(&plug->list);
        INIT_LIST_HEAD(&plug->cb_list);
        plug->should_sort = 0;
+       plug->count = 0;
 
        /*
         * If this is a nested plug, don't actually assign it. It will be
@@ -2709,6 +2714,7 @@ void blk_flush_plug_list(struct blk_plug *plug, bool from_schedule)
                return;
 
        list_splice_init(&plug->list, &list);
+       plug->count = 0;
 
        if (plug->should_sort) {
                list_sort(NULL, &list, plug_rq_cmp);