dev: also check for blank sysfs value containing only '\n'

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/device/dev-cache.c b/lib/device/dev-cache.c
index d912dea88..bcee783a5 100644
--- a/lib/device/dev-cache.c
+++ b/lib/device/dev-cache.c
@@ -379,7 +379,7 @@ static int _get_sysfs_value(const char *path, char *buf, size_t buf_size)
 		return 0;
 	}
 
-	if (!(len = strlen(buf))) {
+	if (!(len = strlen(buf)) || (len == 1 && buf[0] == '\n')) {
 		log_error("_get_sysfs_value: %s: no value", path);
 		return 0;
 	}