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

[Qi Zhang]

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: sta...@dpdk.org

Reported-by: Eads Gage <gage.e...@intel.com>
Signed-off-by: Qi Zhang <qi.z.zh...@intel.com>
---
 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..af9526fe6 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(INFO, "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