Re: [patch] virtio-blk: fix NULL checking in virtblk_alloc_req()
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From: Asias He <hidden>
Date: 2012-09-06 03:02:48
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kernel-janitors
Hello Dan, On 09/05/2012 08:32 PM, Dan Carpenter wrote:
Smatch complains about the inconsistent NULL checking here. Fix it to return NULL on failure. Signed-off-by: Dan Carpenter <redacted>
Thanks for catching this.
quoted hunk ↗ jump to hunk
--- This is only needed in linux-next.diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c index 2edfb5c..457db0c 100644 --- a/drivers/block/virtio_blk.c +++ b/drivers/block/virtio_blk.c@@ -90,10 +90,11 @@ static inline struct virtblk_req *virtblk_alloc_req(struct virtio_blk *vblk, struct virtblk_req *vbr; vbr = mempool_alloc(vblk->pool, gfp_mask); - if (vbr && use_bio) - sg_init_table(vbr->sg, vblk->sg_elems); + if (!vbr) + return NULL; - vbr->vblk = vblk;
The assignment of vbr->vblk is needed.
quoted hunk ↗ jump to hunk
+ if (use_bio) + sg_init_table(vbr->sg, vblk->sg_elems); return vbr; }
-- Asias