[ 24/62] block: fix request_queue->flags initialization
From: Greg Kroah-Hartman
Date: Thu Oct 18 2012 - 23:29:40 EST
3.4-stable review patch. If anyone has any objections, please let me know.
From: Tejun Heo <tj@xxxxxxxxxx>
commit 60ea8226cbd5c8301f9a39edc574ddabcb8150e0 upstream.
A queue newly allocated with blk_alloc_queue_node() has only
QUEUE_FLAG_BYPASS set. For request-based drivers,
blk_init_allocated_queue() is called and q->queue_flags is overwritten
with QUEUE_FLAG_DEFAULT which doesn't include BYPASS even though the
initial bypass is still in effect.
In blk_init_allocated_queue(), or QUEUE_FLAG_DEFAULT to q->queue_flags
instead of overwriting.
Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
Acked-by: Vivek Goyal <vgoyal@xxxxxxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
block/blk-core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
@@ -601,7 +601,7 @@ blk_init_allocated_queue(struct request_
q->request_fn = rfn;
q->prep_rq_fn = NULL;
q->unprep_rq_fn = NULL;
- q->queue_flags = QUEUE_FLAG_DEFAULT;
+ q->queue_flags |= QUEUE_FLAG_DEFAULT;
/* Override internal queue lock with supplied lock pointer */
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