usb: gadget: defer setting maxpacket till ->setup()
maxpacket is set by the udc driver for ep0 very early. This value is
copied by the function gadget used later for the USB_DT_DEVICE and
USB_DT_DEVICE_QUALIFIER query. This seems to work fine so far. For USB3
we need set a different value here. In SS speed it is 2^x with x=9 and
in HS we set something <= 64. If the UDC starts in SS and continues in
HS after the cable has been plugged it will report a too small value.
There setting of this value is defered and taken automaticly from the
ep0 pointer where the UDC driver can update it according to the speed it
detected _after_ a cable has been plugged.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/gadget/gmidi.c b/drivers/usb/gadget/gmidi.c
index 4f40f14..8b9220e 100644
--- a/drivers/usb/gadget/gmidi.c
+++ b/drivers/usb/gadget/gmidi.c
@@ -695,6 +695,7 @@
switch (w_value >> 8) {
case USB_DT_DEVICE:
+ device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket;
value = min(w_length, (u16) sizeof(device_desc));
memcpy(req->buf, &device_desc, value);
break;
@@ -1249,8 +1250,6 @@
dev->req->complete = gmidi_setup_complete;
- device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket;
-
gadget->ep0->driver_data = dev;
INFO(dev, "%s, version: " DRIVER_VERSION "\n", longname);