[PATCH 4.9 076/206] usb: gadget: fix request length error for isoc transfer

4.9-stable review patch. If anyone has any objections, please let me know. -- From: Peter Chen commit 982555fc26f9d8bcdbd5f9db0378fe0682eb4188 upstream. For isoc endpoint descriptor, the wMaxPacketSize is not real max packet size (see Table 9-13. Standard

[PATCH 4.9 076/206] usb: gadget: fix request length error for isoc transfer

4.9-stable review patch. If anyone has any objections, please let me know. -- From: Peter Chen commit 982555fc26f9d8bcdbd5f9db0378fe0682eb4188 upstream. For isoc endpoint descriptor, the wMaxPacketSize is not real max packet size (see Table 9-13. Standard Endpoint Descriptor,