From ad97082bd083abba6d5eaf06bdf88cb123ece1c8 Mon Sep 17 00:00:00 2001
From: Liu Xiaodong <xiaodong.liu@intel.com>
Date: Sat, 24 Oct 2020 06:32:43 -0400
Subject: [PATCH] bdev_aio: fix interrupt mode notify error

Signed-off-by: Liu Xiaodong <xiaodong.liu@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/4865 (master)

(cherry picked from commit 47962dc7a344c5eb66463bb920842af596706f1f)
Change-Id: Ie4492aa33028e8090da96e2b592b20293d694120
Signed-off-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/4873
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Xiaodong Liu <xiaodong.liu@intel.com>
Reviewed-by: John Kariuki <John.K.Kariuki@intel.com>
Reviewed-by: Paul Luse <paul.e.luse@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
---
 module/bdev/aio/bdev_aio.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/module/bdev/aio/bdev_aio.c b/module/bdev/aio/bdev_aio.c
index 07e8b0bd0..1829cacc4 100644
--- a/module/bdev/aio/bdev_aio.c
+++ b/module/bdev/aio/bdev_aio.c
@@ -382,7 +382,8 @@ bdev_aio_group_interrupt(void *arg)
 
 	if (num_events > SPDK_AIO_QUEUE_DEPTH) {
 		num_events -= SPDK_AIO_QUEUE_DEPTH;
-		if (write(group_ch->efd, &num_events, sizeof(num_events))) {
+		rc = write(group_ch->efd, &num_events, sizeof(num_events));
+		if (rc < 0) {
 			SPDK_ERRLOG("failed to notify aio group: %s.\n", spdk_strerror(errno));
 		}
 	}