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net/virtio: check error on setting non block flag

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Report an error message if the flag O_NONBLOCK setting fails,
then return from function.

Coverity issue: 143439
Fixes: ef53b60300 ("net/virtio-user: support LSC")
Cc: stable@dpdk.org

Signed-off-by: Sebastian Basierski <sebastianx.basierski@intel.com>
Acked-by: Jianfeng Tan <jianfeng.tan@intel.com>
Acked-by: Yuanhan Liu <yliu@fridaylinux.org>
This commit is contained in:
Sebastian Basierski 2017-10-24 10:17:38 +02:00 committed by Thomas Monjalon
parent 3a643acd4f
commit 2fd826a301
1 changed files with 5 additions and 1 deletions
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6
drivers/net/virtio/virtio_user_ethdev.c
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@ -86,7 +86,11 @@ virtio_user_read_dev_config(struct virtio_hw *hw, size_t offset,
int flags;
flags = fcntl(dev->vhostfd, F_GETFL);
fcntl(dev->vhostfd, F_SETFL, flags | O_NONBLOCK);
if (fcntl(dev->vhostfd, F_SETFL,
flags | O_NONBLOCK) == -1) {
PMD_DRV_LOG(ERR, "error setting O_NONBLOCK flag");
return;
}
r = recv(dev->vhostfd, buf, 128, MSG_PEEK);
if (r == 0 || (r < 0 && errno != EAGAIN)) {
dev->status &= (~VIRTIO_NET_S_LINK_UP);