linux-kernel - [PATCH 3.14 058/125] usb: dwc3: gadget: return error if command sent to DGCMD register fails

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Message-Id: <20150731194029.174868545@linuxfoundation.org>
Date:	Fri, 31 Jul 2015 12:40:58 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Subbaraya Sundeep Bhatta <sbhatta@...inx.com>,
	Felipe Balbi <balbi@...com>
Subject: [PATCH 3.14 058/125] usb: dwc3: gadget: return error if command sent to DGCMD register fails

3.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Subbaraya Sundeep Bhatta <subbaraya.sundeep.bhatta@...inx.com>

commit 891b1dc022955d36cf4c0f42d383226a930db7ed upstream.

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

Signed-off-by: Subbaraya Sundeep Bhatta <sbhatta@...inx.com>
Fixes: b09bb64239c8 (usb: dwc3: gadget: implement Global Command support)
Signed-off-by: Felipe Balbi <balbi@...com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/usb/dwc3/gadget.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -299,6 +299,8 @@ int dwc3_send_gadget_generic_command(str
 		if (!(reg & DWC3_DGCMD_CMDACT)) {
 			dev_vdbg(dwc->dev, "Command Complete --> %d\n",
 					DWC3_DGCMD_STATUS(reg));
+			if (DWC3_DGCMD_STATUS(reg))
+				return -EINVAL;
 			return 0;
 		}
 


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