From 5910fb39b5470a6f352e0ed39b69571d1afecc5b Mon Sep 17 00:00:00 2001
From: qaqland <anguoli@uniontech.com>
Date: Thu, 27 Nov 2025 11:13:27 +0800
Subject: [PATCH] alsactl: fix error handling in check_control_cdev()

Closes: https://github.com/alsa-project/alsa-utils/pull/310
Signed-off-by: qaqland <anguoli@uniontech.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
---
 alsactl/monitor.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/alsactl/monitor.c b/alsactl/monitor.c
index 36e9398..e830ba5 100644
--- a/alsactl/monitor.c
+++ b/alsactl/monitor.c
@@ -176,7 +176,7 @@ static int check_control_cdev(int infd, bool *retry)
 		ssize_t len = read(infd, buf, sizeof(*ev) + NAME_MAX);
 		if (len < 0) {
 			if (errno != EAGAIN)
-				err = errno;
+				err = -errno;
 			break;
 		} else if (len == 0) {
 			break;
-- 
2.47.3