[PATCH 1/3] eal: remove useless checks for already probed device

[Thomas Monjalon <thomas@monjalon.net>]

The function eal_dev_hotplug_request_to_secondary() never returns
-EEXIST result. The case of already probed device is filtered out.

The test in __handle_secondary_request() was always true.
The test in rte_dev_probe() was never true, and that's fine not
returning -EEXIST if device is already attached in secondary processes.

Fixes: 494db286f37d ("eal: fix multi-process hotplug if attached in secondary")
Cc: dariusz.stojaczyk@intel.com
Cc: qi.z.zhang@intel.com
Cc: stable@dpdk.org

Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
---
 lib/librte_eal/common/eal_common_dev.c | 9 +--------
 lib/librte_eal/common/hotplug_mp.c     | 3 +--
 2 files changed, 2 insertions(+), 10 deletions(-)

diff --git a/lib/librte_eal/common/eal_common_dev.c b/lib/librte_eal/common/eal_common_dev.c
index fd7f5ca7d5..048c0b025f 100644
--- a/lib/librte_eal/common/eal_common_dev.c
+++ b/lib/librte_eal/common/eal_common_dev.c
@@ -247,18 +247,11 @@ rte_dev_probe(const char *devargs)
 		goto rollback;
 	}
 
-	/**
-	 * if any secondary failed to attach, we need to consider if rollback
-	 * is necessary.
-	 */
+	/* if any secondary failed to attach, need to rollback. */
 	if (req.result != 0) {
 		RTE_LOG(ERR, EAL,
 			"Failed to attach device on secondary process\n");
 		ret = req.result;
-
-		/* for -EEXIST, we don't need to rollback. */
-		if (ret == -EEXIST)
-			return ret;
 		goto rollback;
 	}
 
diff --git a/lib/librte_eal/common/hotplug_mp.c b/lib/librte_eal/common/hotplug_mp.c
index 4052a5c7fb..94bd1d896e 100644
--- a/lib/librte_eal/common/hotplug_mp.c
+++ b/lib/librte_eal/common/hotplug_mp.c
@@ -110,8 +110,7 @@ __handle_secondary_request(void *param)
 		if (tmp_req.result != 0) {
 			ret = tmp_req.result;
 			RTE_LOG(ERR, EAL, "Failed to hotplug add device on secondary\n");
-			if (ret != -EEXIST)
-				goto rollback;
+			goto rollback;
 		}
 	} else if (req->t == EAL_DEV_REQ_TYPE_DETACH) {
 		ret = rte_devargs_parse(&da, req->devargs);
-- 
2.20.1