mailbox: Stop using ENOSYS for anything other than unimplemented syscalls

In accordance with e15f431fe2d5 ("errno.h: Improve ENOSYS's comment") and
91c9afaf97ee ("checkpatch.pl: new instances of ENOSYS are errors") we're
converting from the old meaning of: ENOSYS "Function not implemented" to
a more standard EINVAL.

Reported-by: Seraphin Bonnaffe <seraphin.bonnaffe@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/mailbox/mailbox.c b/drivers/mailbox/mailbox.c
index 6a4811f85705..4a36632c236f 100644
--- a/drivers/mailbox/mailbox.c
+++ b/drivers/mailbox/mailbox.c
@@ -375,13 +375,13 @@ struct mbox_chan *mbox_request_channel_byname(struct mbox_client *cl,
 
         if (!np) {
                 dev_err(cl->dev, "%s() currently only supports DT\n", __func__);
-                return ERR_PTR(-ENOSYS);
+                return ERR_PTR(-EINVAL);
         }
 
         if (!of_get_property(np, "mbox-names", NULL)) {
                 dev_err(cl->dev,
                         "%s() requires an \"mbox-names\" property\n", __func__);
-                return ERR_PTR(-ENOSYS);
+                return ERR_PTR(-EINVAL);
         }
 
         of_property_for_each_string(np, "mbox-names", prop, mbox_name) {