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From: Tiwei Bie <tiwei.bie@intel.com>
To: Yunjian Wang <wangyunjian@huawei.com>
Cc: dev@dpdk.org, maxime.coquelin@redhat.com, zhihong.wang@intel.com,
	xudingke@huawei.com, stable@dpdk.org
Subject: Re: [dpdk-stable] [dpdk-dev] [PATCH v2] net/virtio-user: fix return value of tap offload sets not checked
Date: Mon, 13 Jan 2020 10:16:05 +0800
Message-ID: <20200113021605.GA84114@___> (raw)
In-Reply-To: <1578572304-2296-1-git-send-email-wangyunjian@huawei.com>

On Thu, Jan 09, 2020 at 08:18:24PM +0800, Yunjian Wang wrote:
> The function vhost_kernel_tap_set_offload() could return errors,
> the return value need to be checked. And there is no need to fail
> when error is -ENOTSUP.
> 
> Fixes: 1db4d2330bc8 ("net/virtio-user: check negotiated features before set")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
> ---
> v2:
>  * No need to fail when error is -ENOTSUP.
> ---
>  drivers/net/virtio/virtio_user/vhost_kernel_tap.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/virtio/virtio_user/vhost_kernel_tap.c b/drivers/net/virtio/virtio_user/vhost_kernel_tap.c
> index 76bf75423..2a0c2106d 100644
> --- a/drivers/net/virtio/virtio_user/vhost_kernel_tap.c
> +++ b/drivers/net/virtio/virtio_user/vhost_kernel_tap.c
> @@ -66,6 +66,7 @@ vhost_kernel_open_tap(char **p_ifname, int hdr_size, int req_mq,
>  	int sndbuf = INT_MAX;
>  	struct ifreq ifr;
>  	int tapfd;
> +	int ret;
>  
>  	/* TODO:
>  	 * 1. verify we can get/set vnet_hdr_len, tap_probe_vnet_hdr_len
> @@ -131,7 +132,9 @@ vhost_kernel_open_tap(char **p_ifname, int hdr_size, int req_mq,
>  		goto error;
>  	}
>  
> -	vhost_kernel_tap_set_offload(tapfd, features);
> +	ret = vhost_kernel_tap_set_offload(tapfd, features);
> +	if (ret < 0 && ret != ENOTSUP)

s/ENOTSUP/-ENOTSUP/

> +		goto error;
>  
>  	memset(&ifr, 0, sizeof(ifr));
>  	ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
> -- 
> 2.19.1
> 
> 

  reply index

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-09 12:18 Yunjian Wang
2020-01-13  2:16 ` Tiwei Bie [this message]
2020-01-13  7:26   ` wangyunjian

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