[igt-dev] [PATCH i-g-t] lib/igt_sysfs: Return errno from igt_sysfs_printf

[Katarzyna Dec]

Let's add returning errno on failure instead of -1.

Signed-off-by: Katarzyna Dec <katarzyna.dec at intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
---
 lib/igt_sysfs.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/igt_sysfs.c b/lib/igt_sysfs.c
index 8efe889b..6cc7ba44 100644
--- a/lib/igt_sysfs.c
+++ b/lib/igt_sysfs.c
@@ -417,7 +417,7 @@ int igt_sysfs_vprintf(int dir, const char *attr, const char *fmt, va_list ap)
  * printf() wrapper for sysfs.
  *
  * Returns:
- * Number of characters written, negative value on error.
+ * Number of characters written, errno on error.
  */
 int igt_sysfs_printf(int dir, const char *attr, const char *fmt, ...)
 {
@@ -427,6 +427,8 @@ int igt_sysfs_printf(int dir, const char *attr, const char *fmt, ...)
 	va_start(ap, fmt);
 	ret = igt_sysfs_vprintf(dir, attr, fmt, ap);
 	va_end(ap);
+	if (ret < 0)
+		return errno;
 
 	return ret;
 }
-- 
2.17.1