From: Felipe Balbi <felipe.balbi@linux.intel.com>
Date: Tue, 15 Nov 2016 11:05:23 +0000 (+0200)
Subject: usb: dwc3: gadget: use evt->length as we should
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=caefe6c7be4778d0bddb38596ced1b60bd522b14;p=linux-beck.git

usb: dwc3: gadget: use evt->length as we should

Instead of always accessing the macro directly,
let's rely on evt->length which is the actual length
of current event buffer. While unlikely, we could
change event buffer's size at any time.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
---

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 230ffa395dc3..304653fd9223 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2834,7 +2834,7 @@ static irqreturn_t dwc3_process_event_buf(struct dwc3_event_buffer *evt)
 		 * boundary so I worry about that once we try to handle
 		 * that.
 		 */
-		evt->lpos = (evt->lpos + 4) % DWC3_EVENT_BUFFERS_SIZE;
+		evt->lpos = (evt->lpos + 4) % evt->length;
 		left -= 4;
 
 		dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(0), 4);