[dpdk-stable] [PATCH 2/2] bus/vdev: fix hotplug twice

[Thomas Monjalon]

From: Raslan Darawsheh <rasland at mellanox.com>

In case vdev was already probed, it shouldn't be probed again,
and it should return -EEXIST as error.
There are some checks in vdev_probe() and insert_vdev(),
but a check was missing in vdev_plug().
The check is moved in vdev_probe_all_drivers() which is called
in all code paths.

Fixes: e9d159c3d534 ("eal: allow probing a device again")
Cc: stable at dpdk.org

Signed-off-by: Raslan Darawsheh <rasland at mellanox.com>
Signed-off-by: Thomas Monjalon <thomas at monjalon.net>
---
 drivers/bus/vdev/vdev.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/bus/vdev/vdev.c b/drivers/bus/vdev/vdev.c
index 7225411791..87f0e2b6bb 100644
--- a/drivers/bus/vdev/vdev.c
+++ b/drivers/bus/vdev/vdev.c
@@ -143,6 +143,9 @@ vdev_probe_all_drivers(struct rte_vdev_device *dev)
 	struct rte_vdev_driver *driver;
 	int ret;
 
+	if (rte_dev_is_probed(&dev->device))
+		return -EEXIST;
+
 	name = rte_vdev_device_name(dev);
 	VDEV_LOG(DEBUG, "Search driver to probe device %s", name);
 
@@ -480,7 +483,7 @@ static int
 vdev_probe(void)
 {
 	struct rte_vdev_device *dev;
-	int ret = 0;
+	int r, ret = 0;
 
 	/* call the init function for each virtual device */
 	TAILQ_FOREACH(dev, &vdev_device_list, next) {
@@ -489,10 +492,10 @@ vdev_probe(void)
 		 * we call each driver probe.
 		 */
 
-		if (rte_dev_is_probed(&dev->device))
-			continue;
-
-		if (vdev_probe_all_drivers(dev)) {
+		r = vdev_probe_all_drivers(dev);
+		if (r != 0) {
+			if (r == -EEXIST)
+				continue;
 			VDEV_LOG(ERR, "failed to initialize %s device",
 				rte_vdev_device_name(dev));
 			ret = -1;
-- 
2.20.1