[PATCH] blk: Fix bio_io_vec index when checking bvec gaps

[axboe@fb.com (Jens Axboe)]

On 09/01/2015 10:46 AM, Keith Busch wrote:
> Corrects a coding error from earlier patch.
>
> Reported by: Sagi Grimberg <sagig at dev.mellanox.co.il>
> Signed-off-by: Keith Busch <keith.busch at intel.com>
> ---
>   block/blk-merge.c |    2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/block/blk-merge.c b/block/blk-merge.c
> index 53bb485..d088cff 100644
> --- a/block/blk-merge.c
> +++ b/block/blk-merge.c
> @@ -488,7 +488,7 @@ static int req_gap_to_prev(struct request *req, struct bio *next)
>   	struct bio *prev = req->biotail;
>
>   	return bvec_gap_to_prev(req->q, &prev->bi_io_vec[prev->bi_vcnt - 1],
> -			next->bi_io_vec[1].bv_offset);
> +			next->bi_io_vec[0].bv_offset);
>   }

Thanks - good catch, Sagi. I've applied this, and added a Fixes line as 
well.

-- 
Jens Axboe