From 8579d8a35886f91974e0ac4dbdf2edb7dac06d52 Mon Sep 17 00:00:00 2001
From: Joe Slater <joe.slater@windriver.com>
Date: Fri, 18 Dec 2020 11:17:50 +0800
Subject: [PATCH] libmultipath/uevent.c: fix error handling for
 udev_monitor_set_receive_buffer_size

Since systemd v246.5[1], udev_monitor_set_receive_buffer_size() will
return 0 or 1 if successful. We only need to check a negative value for
the failure.

[1] https://github.com/systemd/systemd-stable/commit/4dcae666889ae9469e4406c0bcaffadbc01c4f66
    https://github.com/systemd/systemd-stable/commit/fe9b92e566f837665cc06c82374e4e42f9295c99
    https://github.com/systemd/systemd-stable/commit/5dd4cc4b10daea5d2ba969425ba02d2098dd06a4

Upstream-Status: Pending

Signed-off-by: Joe Slater <joe.slater@windriver.com>
Signed-off-by: Yi Zhao <yi.zhao@windriver.com>
---
 libmultipath/uevent.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libmultipath/uevent.c b/libmultipath/uevent.c
index d38e8a7f..4b298052 100644
--- a/libmultipath/uevent.c
+++ b/libmultipath/uevent.c
@@ -810,7 +810,8 @@ int uevent_listen(struct udev *udev)
 	}
 	pthread_cleanup_push(monitor_cleanup, monitor);
 #ifdef LIBUDEV_API_RECVBUF
-	if (udev_monitor_set_receive_buffer_size(monitor, 128 * 1024 * 1024))
+	err = udev_monitor_set_receive_buffer_size(monitor, 128 * 1024 * 1024);
+	if (err < 0)
 		condlog(2, "failed to increase buffer size");
 #endif
 	fd = udev_monitor_get_fd(monitor);
-- 
2.17.1