diff options
Diffstat (limited to 'drivers/usb/dwc3/ep0.c')
| -rw-r--r-- | drivers/usb/dwc3/ep0.c | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c index 672d55a6d598..396c2af00fed 100644 --- a/drivers/usb/dwc3/ep0.c +++ b/drivers/usb/dwc3/ep0.c @@ -783,7 +783,11 @@ static void dwc3_ep0_complete_data(struct dwc3 *dwc, struct usb_request *ur; struct dwc3_trb *trb; struct dwc3_ep *ep0; - u32 transferred; + unsigned transfer_size = 0; + unsigned maxp; + unsigned remaining_ur_length; + void *buf; + u32 transferred = 0; u32 status; u32 length; u8 epnum; @@ -812,20 +816,24 @@ static void dwc3_ep0_complete_data(struct dwc3 *dwc, } ur = &r->request; + buf = ur->buf; + remaining_ur_length = ur->length; length = trb->size & DWC3_TRB_SIZE_MASK; + maxp = ep0->endpoint.maxpacket; + if (dwc->ep0_bounced) { - unsigned maxp = ep0->endpoint.maxpacket; - unsigned transfer_size = roundup(ur->length, maxp); + transfer_size = roundup((ur->length - transfer_size), + maxp); /* Maximum of DWC3_EP0_BOUNCE_SIZE can only be received */ if (transfer_size > DWC3_EP0_BOUNCE_SIZE) transfer_size = DWC3_EP0_BOUNCE_SIZE; - transferred = min_t(u32, ur->length, - transfer_size - length); - memcpy(ur->buf, dwc->ep0_bounce, transferred); + transferred = min_t(u32, remaining_ur_length, + transfer_size - length); + memcpy(buf, dwc->ep0_bounce, transferred); } else { transferred = ur->length - length; } @@ -934,7 +942,7 @@ static void __dwc3_ep0_do_control_data(struct dwc3 *dwc, DWC3_TRBCTL_CONTROL_DATA); } else if (!IS_ALIGNED(req->request.length, dep->endpoint.maxpacket) && (dep->number == 0)) { - u32 transfer_size; + u32 transfer_size = 0; u32 maxpacket; ret = usb_gadget_map_request(&dwc->gadget, &req->request, @@ -945,7 +953,8 @@ static void __dwc3_ep0_do_control_data(struct dwc3 *dwc, } maxpacket = dep->endpoint.maxpacket; - transfer_size = roundup(req->request.length, maxpacket); + transfer_size = roundup((req->request.length - transfer_size), + maxpacket); if (transfer_size > DWC3_EP0_BOUNCE_SIZE) { dev_WARN(dwc->dev, "bounce buf can't handle req len\n"); |