Re: [ 038/147] block: fix request_queue->flags initialization
From: Herton Ronaldo Krzesinski
Date: Tue Oct 16 2012 - 18:59:50 EST
On Sun, Oct 14, 2012 at 03:36:11PM +0100, Ben Hutchings wrote:
> 3.2-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.
Since QUEUE_FLAG_BYPASS doesn't exist and nothing in
blk_alloc_queue_node is set on 3.2, this change is uneeded then,
but the patch should be harmless anyway.
> 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: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
> block/blk-core.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
> diff --git a/block/blk-core.c b/block/blk-core.c
> index 80e29c9..a17869f 100644
> --- a/block/blk-core.c
> +++ b/block/blk-core.c
> @@ -696,7 +696,7 @@ blk_init_allocated_queue(struct request_queue *q, request_fn_proc *rfn,
> 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 */
> if (lock)
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