netdev - RE: [PATCH] hyperv/netvsc: Delete two error messages for a failed memory allocation in netvsc_init

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Date:   Mon, 8 Jan 2018 15:37:27 +0000
From:   Haiyang Zhang <haiyangz@...rosoft.com>
To:     SF Markus Elfring <elfring@...rs.sourceforge.net>,
        "devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        KY Srinivasan <kys@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>
CC:     LKML <linux-kernel@...r.kernel.org>,
        "kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>
Subject: RE: [PATCH] hyperv/netvsc: Delete two error messages for a failed
 memory allocation in netvsc_init_buf()



> -----Original Message-----
> From: SF Markus Elfring [mailto:elfring@...rs.sourceforge.net]
> Sent: Sunday, January 7, 2018 3:10 PM
> To: devel@...uxdriverproject.org; netdev@...r.kernel.org; Haiyang Zhang
> <haiyangz@...rosoft.com>; KY Srinivasan <kys@...rosoft.com>; Stephen
> Hemminger <sthemmin@...rosoft.com>
> Cc: LKML <linux-kernel@...r.kernel.org>; kernel-janitors@...r.kernel.org
> Subject: [PATCH] hyperv/netvsc: Delete two error messages for a failed
> memory allocation in netvsc_init_buf()
> 
> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Sun, 7 Jan 2018 21:03:26 +0100
> 
> Omit extra messages for a memory allocation failure in this function.
> 
> This issue was detected by using the Coccinelle software.
> 
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
> ---
>  drivers/net/hyperv/netvsc.c | 5 -----
>  1 file changed, 5 deletions(-)
> 
> diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c index
> 17e529af79dc..c1ec02f801f6 100644
> --- a/drivers/net/hyperv/netvsc.c
> +++ b/drivers/net/hyperv/netvsc.c
> @@ -275,9 +275,6 @@ static int netvsc_init_buf(struct hv_device *device,
> 
>  	net_device->recv_buf = vzalloc(buf_size);
>  	if (!net_device->recv_buf) {
> -		netdev_err(ndev,
> -			   "unable to allocate receive buffer of size %u\n",
> -			   buf_size);
>  		ret = -ENOMEM;
>  		goto cleanup;
>  	}
> @@ -357,8 +354,6 @@ static int netvsc_init_buf(struct hv_device *device,
> 
>  	net_device->send_buf = vzalloc(buf_size);
>  	if (!net_device->send_buf) {
> -		netdev_err(ndev, "unable to allocate send buffer of
> size %u\n",
> -			   buf_size);
>  		ret = -ENOMEM;
>  		goto cleanup;
>  	}

These messages are not displayed anywhere else:
"unable to allocate receive buffer of size %u\n"
"unable to allocate send buffer of size %u\n",

After set ret = -ENOMEM; and cleanup, we won't know which buffer allocation failed without the error message.

So please do not remove these messages.

Thanks,
- Haiyang