[dpdk-dev] [PATCH v2] bus/vdev: fix wrong error log on secondary device scan

[Qi Zhang <qi.z.zhang@intel.com>]

When a secondary process handles VDEV_SCAN_ONE mp action, it is possible
the device is already be inserted. This happens when we have multiple
secondary processes which cause multiple broadcasts from primary during
bus->scan. So we don't need to log any error for -EEXIST.

Bugzilla ID: 84
Fixes: cdb068f031c6 ("bus/vdev: scan by multi-process channel")
Cc: stable@dpdk.org

Reported-by: Eads Gage <gage.eads@intel.com>
Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
---

v2:
- change log level to DEBUG for the case device already exist.

 drivers/bus/vdev/vdev.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/bus/vdev/vdev.c b/drivers/bus/vdev/vdev.c
index 6139dd551..69dee89a8 100644
--- a/drivers/bus/vdev/vdev.c
+++ b/drivers/bus/vdev/vdev.c
@@ -346,6 +346,7 @@ vdev_action(const struct rte_mp_msg *mp_msg, const void *peer)
 	const struct vdev_param *in = (const struct vdev_param *)mp_msg->param;
 	const char *devname;
 	int num;
+	int ret;
 
 	strlcpy(mp_resp.name, VDEV_MP_KEY, sizeof(mp_resp.name));
 	mp_resp.len_param = sizeof(*ou);
@@ -380,7 +381,10 @@ vdev_action(const struct rte_mp_msg *mp_msg, const void *peer)
 		break;
 	case VDEV_SCAN_ONE:
 		VDEV_LOG(INFO, "receive vdev, %s", in->name);
-		if (insert_vdev(in->name, NULL, NULL) < 0)
+		ret = insert_vdev(in->name, NULL, NULL);
+		if (ret == -EEXIST)
+			VDEV_LOG(DEBUG, "device already exist, %s", in->name);
+		else if (ret < 0)
 			VDEV_LOG(ERR, "failed to add vdev, %s", in->name);
 		break;
 	default:
-- 
2.13.6