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usb: gadget: composite: fix bMaxPacketSize for SuperSpeed 

For bMaxPacketSize0 we usually take what is specified in ep0->maxpacket.
This is fine in most cases, however on SuperSpeed bMaxPacketSize0
specifies the exponent instead of the actual size in bytes. The only
valid value on SS is 9 which denotes 512 bytes.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
hifive-unleashed-5.1
Sebastian Andrzej Siewior 2011-07-19 20:21:52 +02:00 committed by Felipe Balbi
parent 9c5ea0ea27
commit a8f21156a0
1 changed files with 4 additions and 2 deletions
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6
drivers/usb/gadget/composite.c
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@ -1079,10 +1079,12 @@ composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
cdev->desc.bMaxPacketSize0 =
cdev->gadget->ep0->maxpacket;
if (gadget_is_superspeed(gadget)) {
if (gadget->speed >= USB_SPEED_SUPER)
if (gadget->speed >= USB_SPEED_SUPER) {
cdev->desc.bcdUSB = cpu_to_le16(0x0300);
else
cdev->desc.bMaxPacketSize0 = 9;
} else {
cdev->desc.bcdUSB = cpu_to_le16(0x0210);
}
}
value = min(w_length, (u16) sizeof cdev->desc);