Different configuration may draw different power. Inform the controller
driver of the change so it can respond properly (e.g. GET_STATUS
request). This fixes an issue with setting MaxPower from configfs. The
composite driver doesn't check this value when setting self-powered.
Fixes: 88af8bbe4ef7 ("usb: gadget: the start of the configfs interface")
Signed-off-by: Thinh Nguyen <thinhn@xxxxxxxxxxxx>
---
drivers/usb/gadget/composite.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 223f72d4d9ed..2fbeb2c19665 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -861,6 +861,11 @@ static int set_config(struct usb_composite_dev *cdev,
else
power = min(power, 900U);
done:
+ if (power <= USB_SELF_POWER_VBUS_MAX_DRAW)
+ usb_gadget_set_selfpowered(gadget);
+ else
+ usb_gadget_clear_selfpowered(gadget);
+
usb_gadget_vbus_draw(gadget, power);
if (result >= 0 && cdev->delayed_status)
result = USB_GADGET_DELAYED_STATUS;
--
2.11.0
