usb: typec: ucsi: Fix the return value of ucsi_run_command()

The command execution routines need to return the amount of
data that was transferred when succesful.

This fixes an issue where the alternate modes and the power
delivery capabilities are not getting registered.

Fixes: 5e9c1662a89b ("usb: typec: ucsi: rework command execution functions")
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20240809150343.286942-1-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
index 432a2d6266d714591ea1c5c5d6b51a0eacd74fa3..4039851551c1b7251b5ae5ec1402092b55575073 100644 (file)
--- a/drivers/usb/typec/ucsi/ucsi.c
+++ b/drivers/usb/typec/ucsi/ucsi.c
@@ -137,7 +137,7 @@ static int ucsi_run_command(struct ucsi *ucsi, u64 command, u32 *cci,
        if (ret)
                return ret;
 
-       return err;
+       return err ?: UCSI_CCI_LENGTH(*cci);
 }
 
 static int ucsi_read_error(struct ucsi *ucsi, u8 connector_num)