eal/linux: fix device hotplug

The device event interrupt handler was always freed.

Bugzilla ID: 845
Fixes: c2bd9367e18f ("lib: remove direct access to interrupt handle")
Signed-off-by: David Marchand <david.marchand@redhat.com>
Tested-by: Yan Xia <yanx.xia@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>

diff --git a/lib/eal/linux/eal_dev.c b/lib/eal/linux/eal_dev.c
index 6aaeffb4e9160b3b49edf348407d52bfc8701532..1fd00a482baf2aa8a27fafda1ae3016462cdca0e 100644 (file)
--- a/lib/eal/linux/eal_dev.c
+++ b/lib/eal/linux/eal_dev.c
@@ -320,10 +320,12 @@ rte_dev_event_monitor_start(void)
                goto exit;
        }
 
-       if (rte_intr_type_set(intr_handle, RTE_INTR_HANDLE_DEV_EVENT))
+       ret = rte_intr_type_set(intr_handle, RTE_INTR_HANDLE_DEV_EVENT);
+       if (ret)
                goto exit;
 
-       if (rte_intr_fd_set(intr_handle, -1))
+       ret = rte_intr_fd_set(intr_handle, -1);
+       if (ret)
                goto exit;
 
        ret = dev_uev_socket_fd_create();
@@ -342,7 +344,10 @@ rte_dev_event_monitor_start(void)
        monitor_refcount++;
 
 exit:
-       rte_intr_instance_free(intr_handle);
+       if (ret) {
+               rte_intr_instance_free(intr_handle);
+               intr_handle = NULL;
+       }
        rte_rwlock_write_unlock(&monitor_lock);
        return ret;
 }
@@ -373,6 +378,7 @@ rte_dev_event_monitor_stop(void)
 
        close(rte_intr_fd_get(intr_handle));
        rte_intr_instance_free(intr_handle);
+       intr_handle = NULL;
 
        monitor_refcount--;