[PATCH] eal/linux: register mp hotplug callback after memory init

[Zhihong Wang <wangzhihong.wzh@bytedance.com>]

Secondary would crash if it tries to handle mp requests before memory
init, since globals such as eth_dev_shared_data_lock are not accessible
to it at this moment.
---
 lib/eal/linux/eal.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/lib/eal/linux/eal.c b/lib/eal/linux/eal.c
index ae323cd492..a74d564597 100644
--- a/lib/eal/linux/eal.c
+++ b/lib/eal/linux/eal.c
@@ -1058,12 +1058,6 @@ rte_eal_init(int argc, char **argv)
 		}
 	}
 
-	/* register multi-process action callbacks for hotplug */
-	if (eal_mp_dev_hotplug_init() < 0) {
-		rte_eal_init_alert("failed to register mp callback for hotplug");
-		return -1;
-	}
-
 	if (rte_bus_scan()) {
 		rte_eal_init_alert("Cannot scan the buses for devices");
 		rte_errno = ENODEV;
@@ -1221,6 +1215,12 @@ rte_eal_init(int argc, char **argv)
 		return -1;
 	}
 
+	/* register multi-process action callbacks for hotplug after memory init */
+	if (eal_mp_dev_hotplug_init() < 0) {
+		rte_eal_init_alert("failed to register mp callback for hotplug");
+		return -1;
+	}
+
 	if (rte_eal_tailqs_init() < 0) {
 		rte_eal_init_alert("Cannot init tail queues for objects");
 		rte_errno = EFAULT;
-- 
2.11.0