[PATCH 6.1 249/272] usb: typec: Return size of buffer if pd_set operation succeeds

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6.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Kyle Tso <kyletso@xxxxxxxxxx>

commit 53f5094fdf5deacd99b8655df692e9278506724d upstream.

The attribute writing should return the number of bytes used from the
buffer on success.

Fixes: a7cff92f0635 ("usb: typec: USB Power Delivery helpers for ports and partners")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Kyle Tso <kyletso@xxxxxxxxxx>
Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Reviewed-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240319074309.3306579-1-kyletso@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/usb/typec/class.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

--- a/drivers/usb/typec/class.c
+++ b/drivers/usb/typec/class.c
@@ -1245,6 +1245,7 @@ static ssize_t select_usb_power_delivery
 {
 	struct typec_port *port = to_typec_port(dev);
 	struct usb_power_delivery *pd;
+	int ret;
 
 	if (!port->ops || !port->ops->pd_set)
 		return -EOPNOTSUPP;
@@ -1253,7 +1254,11 @@ static ssize_t select_usb_power_delivery
 	if (!pd)
 		return -EINVAL;
 
-	return port->ops->pd_set(port, pd);
+	ret = port->ops->pd_set(port, pd);
+	if (ret)
+		return ret;
+
+	return size;
 }
 
 static ssize_t select_usb_power_delivery_show(struct device *dev,






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