usb: dwc3: gadget: fix high speed multiplier setting

stable inclusion
from stable-v5.10.137
commit f294829fb47ee508ad21566f8e29db82d41a5a79
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I60PLB

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=f294829fb47ee508ad21566f8e29db82d41a5a79

--------------------------------

commit 8affe37c upstream.

For High-Speed Transfers the prepare_one_trb function is calculating the
multiplier setting for the trb based on the length parameter of the trb
currently prepared. This assumption is wrong. For trbs with a sg list,
the length of the actual request has to be taken instead.

Fixes: 40d829fb ("usb: dwc3: gadget: Correct ISOC DATA PIDs for short packets")
Cc: stable <stable@kernel.org>
Signed-off-by: NMichael Grzeschik <m.grzeschik@pengutronix.de>
Link: https://lore.kernel.org/r/20220704141812.1532306-3-m.grzeschik@pengutronix.deSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Reviewed-by: NWei Li <liwei391@huawei.com>

drivers/usb/dwc3/gadget.c

@@ -1052,10 +1052,10 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
 				unsigned int mult = 2;
 				unsigned int maxp = usb_endpoint_maxp(ep->desc);
 
-				if (trb_length <= (2 * maxp))
+				if (req->request.length <= (2 * maxp))
 					mult--;
 
-				if (trb_length <= maxp)
+				if (req->request.length <= maxp)
 					mult--;
 
 				trb->size |= DWC3_TRB_SIZE_PCM1(mult);