Re: [Qemu-devel] [PATCH 1/2] virtio-blk: Remove useless condition around g_free()

[Fam Zheng]

On Tue, 02/07 21:27, Fam Zheng wrote:
> Laszlo spotted and studied this wasteful "if". He pointed out:
> 
> The original virtio_blk_free_request needed an "if" as it accesses one
> field, since 671ec3f05655 ("virtio-blk: Convert VirtIOBlockReq.elem to
> pointer", 2014-06-11); later on in f897bf751fbd ("virtio-blk: embed
> VirtQueueElement in VirtIOBlockReq", 2014-07-09) the field became
> embedded, so the "if" became unnecessary (at which point we were using
> g_slice_free(), but it is the same.
> 
> Now drop it.
> 
> Reported-by: Laszlo Ersek <address@hidden>
> Signed-off-by: Fam Zheng <address@hidden>
> ---
>  hw/block/virtio-blk.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
> index 702eda8..2858c31 100644
> --- a/hw/block/virtio-blk.c
> +++ b/hw/block/virtio-blk.c
> @@ -42,9 +42,7 @@ static void virtio_blk_init_request(VirtIOBlock *s, 
> VirtQueue *vq,
>  
>  static void virtio_blk_free_request(VirtIOBlockReq *req)
>  {
> -    if (req) {
> -        g_free(req);
> -    }
> +    g_free(req);
>  }
>  
>  static void virtio_blk_req_complete(VirtIOBlockReq *req, unsigned char 
> status)
> -- 
> 2.9.3
> 
> 

Cc: address@hidden

(Let's drop 2/2 and perhaps merge this via trivial)

Fam