Re: [dpdk-stable] [dpdk-dev] [PATCH] vhost: fix error code check when creating pthread

[Jens Freimann <jfreimann@redhat.com>]

On Fri, Dec 08, 2017 at 11:19:49AM +0100, Olivier Matz wrote:
>On error, pthread_create() returns a positive number (errno).
>Fix the test on the return value.
>
>Fixes: af1475918124 ("vhost: introduce API to start a specific driver")
>Fixes: e623e0c6d8a5 ("vhost: add reconnect ability")
>Cc: stable@dpdk.org
>
>Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
>---
> lib/librte_vhost/socket.c | 7 +++----
> 1 file changed, 3 insertions(+), 4 deletions(-)
>
>diff --git a/lib/librte_vhost/socket.c b/lib/librte_vhost/socket.c
>index 422da002f..811e6bf16 100644
>--- a/lib/librte_vhost/socket.c
>+++ b/lib/librte_vhost/socket.c
>@@ -472,7 +472,7 @@ vhost_user_reconnect_init(void)
>
> 	ret = pthread_create(&reconn_tid, NULL,
> 			     vhost_user_client_reconnect, NULL);
>-	if (ret < 0) {
>+	if (ret != 0) {
> 		RTE_LOG(ERR, VHOST_CONFIG, "failed to create reconnect thread");
> 		if (pthread_mutex_destroy(&reconn_list.mutex)) {
> 			RTE_LOG(ERR, VHOST_CONFIG,
>@@ -678,9 +678,8 @@ rte_vhost_driver_register(const char *path, uint64_t flags)
> 	if ((flags & RTE_VHOST_USER_CLIENT) != 0) {
> 		vsocket->reconnect = !(flags & RTE_VHOST_USER_NO_RECONNECT);
> 		if (vsocket->reconnect && reconn_tid == 0) {
>-			if (vhost_user_reconnect_init() < 0) {
>+			if (vhost_user_reconnect_init() != 0)
> 				goto out_mutex;
>-			}
> 		}
> 	} else {
> 		vsocket->is_server = true;
>@@ -837,7 +836,7 @@ rte_vhost_driver_start(const char *path)
> 	if (fdset_tid == 0) {
> 		int ret = pthread_create(&fdset_tid, NULL, fdset_event_dispatch,
> 				     &vhost_user.fdset);
>-		if (ret < 0)
>+		if (ret != 0)
> 			RTE_LOG(ERR, VHOST_CONFIG,
> 				"failed to create fdset handling thread");
> 	}

Reviewed-by: Jens Freimann <jfreimann@redhat.com>