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* [PATCH v1] usb: typec: Return size of buffer if pd_set operation succeeds
@ 2024-03-19  7:43 Kyle Tso
  2024-03-19 13:58 ` Guenter Roeck
  2024-03-22  9:47 ` Heikki Krogerus
  0 siblings, 2 replies; 3+ messages in thread
From: Kyle Tso @ 2024-03-19  7:43 UTC (permalink / raw)
  To: linux, heikki.krogerus, gregkh
  Cc: badhri, linux-kernel, linux-usb, Kyle Tso, stable

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@vger.kernel.org
Signed-off-by: Kyle Tso <kyletso@google.com>
---
 drivers/usb/typec/class.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
index 389c7f0b8d93..9610e647a8d4 100644
--- a/drivers/usb/typec/class.c
+++ b/drivers/usb/typec/class.c
@@ -1310,6 +1310,7 @@ 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;
@@ -1318,7 +1319,11 @@ 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,
-- 
2.44.0.291.gc1ea87d7ee-goog


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Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
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2024-03-19  7:43 [PATCH v1] usb: typec: Return size of buffer if pd_set operation succeeds Kyle Tso
2024-03-19 13:58 ` Guenter Roeck
2024-03-22  9:47 ` Heikki Krogerus

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