commit 891b1dc022955d36cf4c0f42d383226a930db7ed
author Subbaraya Sundeep Bhatta <subbaraya.sundeep.bhatta@xilinx.com> Thu May 21 15:46:47 2015 +0530
committer Felipe Balbi <balbi@ti.com> Tue May 26 10:39:23 2015 -0500
tree 7c742d275705b98154fd063cf9181d20bac56cd7
parent 591fa9dd3fee3de8c729febca395beb75c8ee819

usb: dwc3: gadget: return error if command sent to DGCMD register fails

We need to return error to caller if command is not sent to
controller succesfully.

Signed-off-by: Subbaraya Sundeep Bhatta <sbhatta@xilinx.com>
Fixes: b09bb64239c8 (usb: dwc3: gadget: implement Global Command support)
Cc: <stable@vger.kernel.org> #v3.5+
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/dwc3/gadget.c

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 8946c32..fcbe120 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -291,6 +291,8 @@
 			dwc3_trace(trace_dwc3_gadget,
 					"Command Complete --> %d",
 					DWC3_DGCMD_STATUS(reg));
+			if (DWC3_DGCMD_STATUS(reg))
+				return -EINVAL;
 			return 0;
 		}