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 <[email protected]>
Signed-off-by: Lee Jones <[email protected]>
---
 drivers/mailbox/mailbox.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/mailbox/mailbox.c b/drivers/mailbox/mailbox.c
index 6a4811f..4a36632 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) {
-- 
1.9.1

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