linux-kernel - [PATCH 3.4 12/65] usb: dwc3: gadget: return error if command sent to DEPCMD register fails

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Message-Id: <1445302095-4695-12-git-send-email-lizf@kernel.org>
Date:	Tue, 20 Oct 2015 08:47:22 +0800
From:	lizf@...nel.org
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>, Zefan Li <lizefan@...wei.com>
Subject: [PATCH 3.4 12/65] usb: dwc3: gadget: return error if command sent to DEPCMD register fails

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

3.4.110-rc1 review patch.  If anyone has any objections, please let me know.

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


commit 76e838c9f7765f9a6205b4d558d75a66104bc60d 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: 72246da40f37 (usb: Introduce DesignWare USB3 DRD Driver)
Signed-off-by: Felipe Balbi <balbi@...com>
Signed-off-by: Zefan Li <lizefan@...wei.com>
---
 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 b7f8926..b43c6f9 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -301,6 +301,8 @@ int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep,
 		if (!(reg & DWC3_DEPCMD_CMDACT)) {
 			dev_vdbg(dwc->dev, "Command Complete --> %d\n",
 					DWC3_DEPCMD_STATUS(reg));
+			if (DWC3_DEPCMD_STATUS(reg))
+				return -EINVAL;
 			return 0;
 		}
 
-- 
1.9.1

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