[PATCH] rfkill: return ENOTTY on invalid ioctl

[Thomas Weißschuh]

For unknown ioctls the correct error is
ENOTTY "Inappropriate ioctl for device".

ENOSYS as returned before should only be used to indicate that a syscall
is not available at all.

Signed-off-by: Thomas Weißschuh <linux@xxxxxxxxxxxxxx>
---
 net/rfkill/core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/rfkill/core.c b/net/rfkill/core.c
index 14cc8fe8584b..c3feb4f49d09 100644
--- a/net/rfkill/core.c
+++ b/net/rfkill/core.c
@@ -1351,11 +1351,11 @@ static long rfkill_fop_ioctl(struct file *file, unsigned int cmd,
 			     unsigned long arg)
 {
 	struct rfkill_data *data = file->private_data;
-	int ret = -ENOSYS;
+	int ret = -ENOTTY;
 	u32 size;
 
 	if (_IOC_TYPE(cmd) != RFKILL_IOC_MAGIC)
-		return -ENOSYS;
+		return -ENOTTY;
 
 	mutex_lock(&data->mtx);
 	switch (_IOC_NR(cmd)) {

---
base-commit: 7d461b291e65938f15f56fe58da2303b07578a76
change-id: 20231101-rfkill-ioctl-enosys-00a2bb0a4ab1

Best regards,
-- 
Thomas Weißschuh <linux@xxxxxxxxxxxxxx>