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path: root/drivers/usb/dwc3/ep0.c
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Diffstat (limited to 'drivers/usb/dwc3/ep0.c')
-rw-r--r--drivers/usb/dwc3/ep0.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index 69e769c35..06ecd1e68 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -820,6 +820,11 @@ static void dwc3_ep0_complete_data(struct dwc3 *dwc,
unsigned maxp = ep0->endpoint.maxpacket;
transfer_size += (maxp - (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);
@@ -941,11 +946,14 @@ static void __dwc3_ep0_do_control_data(struct dwc3 *dwc,
return;
}
- WARN_ON(req->request.length > DWC3_EP0_BOUNCE_SIZE);
-
maxpacket = dep->endpoint.maxpacket;
transfer_size = roundup(req->request.length, maxpacket);
+ if (transfer_size > DWC3_EP0_BOUNCE_SIZE) {
+ dev_WARN(dwc->dev, "bounce buf can't handle req len\n");
+ transfer_size = DWC3_EP0_BOUNCE_SIZE;
+ }
+
dwc->ep0_bounced = true;
/*