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usb: gadget: composite: Allow vbus_draw() to be called with 0mA

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Similar to commit 9ffbd89c4a ("USB: gadget: composite: Allow
bMaxPower=0 if self-powered"), c->MaxPower may be allowed to be 0
when the gadget's configuration indicates it is self-powered. Thus
allow 0 to be passed directly to usb_gadget_vbus_draw() instead of
defaulting to CONFIG_USB_GADGET_VBUS_DRAW which is non-zero.

Change-Id: I4bf677a31a449c7763e2decad4860909f359dcb7
Signed-off-by: Jack Pham <jackp@codeaurora.org>
This commit is contained in:
Jack Pham 2020-12-01 09:29:12 -08:00
commit a109977adf
1 changed files with 5 additions and 1 deletions
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6
drivers/usb/gadget/composite.c
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@ -944,7 +944,11 @@ static int set_config(struct usb_composite_dev *cdev,
}
/* when we return, be sure our power usage is valid */
power = c->MaxPower ? c->MaxPower : CONFIG_USB_GADGET_VBUS_DRAW;
if (c->MaxPower || (c->bmAttributes & USB_CONFIG_ATT_SELFPOWER))
power = c->MaxPower;
else
power = CONFIG_USB_GADGET_VBUS_DRAW;
if (gadget->speed < USB_SPEED_SUPER)
power = min(power, 500U);
else