From: John Youn <johnyoun@synopsys.com>
Date: Tue, 1 Mar 2016 01:53:35 +0000 (-0800)
Subject: usb: dwc2: Fix issues in dwc2_complete_non_isoc_xfer_ddma()
X-Git-Tag: v5.15~14021^2~4^2~6
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=1fc659894994c7faa67e51a4b5a981ab4cf0f3a5;p=platform%2Fkernel%2Flinux-starfive.git

usb: dwc2: Fix issues in dwc2_complete_non_isoc_xfer_ddma()

Fixes a static analysis issue in dwc2_complete_non_isoc_xfer_ddma(). The
qtd was being passed to a function after being freed. It was not being
used in the function so this doesn't fix any bugs. But it fixes up the
warning and makes the code safer by setting qtd to NULL and not using it
at all.

Reported-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
---

diff --git a/drivers/usb/dwc2/hcd_ddma.c b/drivers/usb/dwc2/hcd_ddma.c
index 27350d0..0e1d42b 100644
--- a/drivers/usb/dwc2/hcd_ddma.c
+++ b/drivers/usb/dwc2/hcd_ddma.c
@@ -1245,8 +1245,10 @@ static void dwc2_complete_non_isoc_xfer_ddma(struct dwc2_hsotg *hsotg,
 		for (i = 0; i < qtd_desc_count; i++) {
 			if (dwc2_process_non_isoc_desc(hsotg, chan, chnum, qtd,
 						       desc_num, halt_status,
-						       &xfer_done))
+						       &xfer_done)) {
+				qtd = NULL;
 				goto stop_scan;
+			}
 
 			desc_num++;
 		}
@@ -1261,7 +1263,7 @@ stop_scan:
 		if (halt_status == DWC2_HC_XFER_STALL)
 			qh->data_toggle = DWC2_HC_PID_DATA0;
 		else
-			dwc2_hcd_save_data_toggle(hsotg, chan, chnum, qtd);
+			dwc2_hcd_save_data_toggle(hsotg, chan, chnum, NULL);
 	}
 
 	if (halt_status == DWC2_HC_XFER_COMPLETE) {