[RFC v4 2/5] eal/freebsd: fix a FD leak in the alarm subsystem

[David Marchand <david.marchand@redhat.com>]

Caught by code review, while looking at rte_intr_instance_free() users.

Even if the FD is not used, it must still be closed when uninitialising
the alarm subsystem.

Fixes: 26021a715067 ("eal/bsd: support alarm API")
Cc: stable@dpdk.org

Signed-off-by: David Marchand <david.marchand@redhat.com>
---
Changes since RFC v3:
- fixed compilation,

---
 lib/eal/freebsd/eal_alarm.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/eal/freebsd/eal_alarm.c b/lib/eal/freebsd/eal_alarm.c
index c03e281e67..8544fe8d03 100644
--- a/lib/eal/freebsd/eal_alarm.c
+++ b/lib/eal/freebsd/eal_alarm.c
@@ -10,6 +10,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
+#include <unistd.h>
 #include <errno.h>
 
 #include <eal_export.h>
@@ -54,6 +55,8 @@ rte_eal_alarm_cleanup(void)
 	int ret = rte_intr_callback_unregister_sync(intr_handle,
 			eal_alarm_callback, (void *)-1);
 	if (ret >= 0) {
+		close(rte_intr_fd_get(intr_handle));
+		rte_intr_fd_set(intr_handle, -1);
 		rte_intr_instance_free(intr_handle);
 		intr_handle = NULL;
 	}
@@ -62,7 +65,7 @@ rte_eal_alarm_cleanup(void)
 int
 rte_eal_alarm_init(void)
 {
-	int fd;
+	int fd = -1;
 
 	intr_handle = rte_intr_instance_alloc(RTE_INTR_INSTANCE_F_PRIVATE);
 	if (intr_handle == NULL) {
@@ -88,6 +91,8 @@ rte_eal_alarm_init(void)
 
 	return 0;
 error:
+	if (fd >= 0)
+		close(fd);
 	rte_intr_instance_free(intr_handle);
 	return -1;
 }
-- 
2.54.0