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usb: typec: Return size of buffer if pd_set operation succeeds 

commit 53f5094fdf5deacd99b8655df692e9278506724d upstream.

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

Fixes: a7cff92f06 ("usb: typec: USB Power Delivery helpers for ports and partners")
Cc: stable@vger.kernel.org
Signed-off-by: Kyle Tso <kyletso@google.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20240319074309.3306579-1-kyletso@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kyle Tso 2024-03-19 15:43:09 +08:00 committed by Greg Kroah-Hartman
parent 9973107672
commit c708b704c2
1 changed files with 6 additions and 1 deletions
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7
drivers/usb/typec/class.c
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@ -1264,6 +1264,7 @@ static ssize_t select_usb_power_delivery_store(struct device *dev,
{
struct typec_port *port = to_typec_port(dev);
struct usb_power_delivery *pd;
int ret;
if (!port->ops || !port->ops->pd_set)
return -EOPNOTSUPP;
@ -1272,7 +1273,11 @@ static ssize_t select_usb_power_delivery_store(struct device *dev,
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,