usb: gadget: fix request length error for isoc transfer
authorPeter Chen <peter.chen@nxp.com>
Tue, 8 Nov 2016 02:08:24 +0000 (10:08 +0800)
committerFelipe Balbi <felipe.balbi@linux.intel.com>
Fri, 18 Nov 2016 11:54:09 +0000 (13:54 +0200)
commit982555fc26f9d8bcdbd5f9db0378fe0682eb4188
tree3b562298a9c9ccb692872df771e8e72eeb021dd1
parentdbf499cf720a0096acea7641492d9edeffc25d10
usb: gadget: fix request length error for isoc transfer

For isoc endpoint descriptor, the wMaxPacketSize is not real max packet
size (see Table 9-13. Standard Endpoint Descriptor, USB 2.0 specifcation),
it may contain the number of packet, so the real max packet should be
ep->desc->wMaxPacketSize && 0x7ff.

Cc: Felipe F. Tonello <eu@felipetonello.com>
Cc: Felipe Balbi <felipe.balbi@linux.intel.com>
Fixes: 16b114a6d797 ("usb: gadget: fix usb_ep_align_maybe
  endianness and new usb_ep_aligna")

Signed-off-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
include/linux/usb/gadget.h