linux-kernel - [PATCH 3.12 062/123] usb: dwc3: gadget: return error if command sent to DGCMD register fails

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Date:	Tue,  4 Aug 2015 16:40:06 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Subbaraya Sundeep Bhatta <subbaraya.sundeep.bhatta@...inx.com>,
	Subbaraya Sundeep Bhatta <sbhatta@...inx.com>,
	Felipe Balbi <balbi@...com>, Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 062/123] usb: dwc3: gadget: return error if command sent to DGCMD register fails

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

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

===============

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: Jiri Slaby <jslaby@...e.cz>
---
 drivers/usb/dwc3/gadget.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index d19564d0f79a..eb678c5300a6 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -299,6 +299,8 @@ int dwc3_send_gadget_generic_command(struct dwc3 *dwc, int cmd, u32 param)
 		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;
 		}
 
-- 
2.5.0

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