linux-kernel - Re: [PATCH v2] NVMe: fix error return code in nvme_submit_bio

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Date:	Fri, 17 May 2013 09:42:01 -0400
From:	Matthew Wilcox <willy@...ux.intel.com>
To:	Wei Yongjun <weiyj.lk@...il.com>
Cc:	vishal.l.verma@...el.com, yongjun_wei@...ndmicro.com.cn,
	linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] NVMe: fix error return code in nvme_submit_bio_queue()

On Mon, May 13, 2013 at 10:29:04PM +0800, Wei Yongjun wrote:
> From: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
> 
> Fix to return -ENOMEM in the nvem iod alloc error handling case instead
> of 0(possible overwrite to 0 by above nvme_submit_flush_data()), as done
> elsewhere in this function.
> 
> Signed-off-by: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>

Applied, slightly modified to fit the style a little better.

> v1 -> v2: send to mail list from MAINTAINERS
> ---
>  drivers/block/nvme-core.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c
> index 8efdfaa..750c337 100644
> --- a/drivers/block/nvme-core.c
> +++ b/drivers/block/nvme-core.c
> @@ -629,7 +629,7 @@ static int nvme_submit_bio_queue(struct nvme_queue *nvmeq, struct nvme_ns *ns,
>  	struct nvme_command *cmnd;
>  	struct nvme_iod *iod;
>  	enum dma_data_direction dma_dir;
> -	int cmdid, length, result = -ENOMEM;
> +	int cmdid, length, result;
>  	u16 control;
>  	u32 dsmgmt;
>  	int psegs = bio_phys_segments(ns->queue, bio);
> @@ -641,8 +641,10 @@ static int nvme_submit_bio_queue(struct nvme_queue *nvmeq, struct nvme_ns *ns,
>  	}
>  
>  	iod = nvme_alloc_iod(psegs, bio->bi_size, GFP_ATOMIC);
> -	if (!iod)
> +	if (!iod) {
> +		result = -ENOMEM;
>  		goto nomem;
> +	}
>  	iod->private = bio;
>  
>  	result = -EBUSY;
--
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