usb: dwc3: DEPCMD/DGCMD patches for stable

[Kamal Mostafa <kamal@canonical.com>]

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Hi Felipe and Subbaraya-

I understand that you'd like us to hold off on applying these two to the
stable kernels:

  usb: dwc3: gadget: Fix incorrect DEPCMD and DGCMD status macros
  usb: dwc3: gadget: return error if command sent to DEPCMD register fails

What about this one then?:

  891b1dc022955d36cf4c0f42d383226a930db7ed 
  usb: dwc3: gadget: return error if command sent to DGCMD register fails

Okay to apply that one to stable, or hold it also?

 -Kamal


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>From 891b1dc022955d36cf4c0f42d383226a930db7ed Mon Sep 17 00:00:00 2001
From: Subbaraya Sundeep Bhatta <subbaraya.sundeep.bhatta@xilinx.com>
Date: Thu, 21 May 2015 15:46:47 +0530
Subject: 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 | 2 ++
 1 file changed, 2 insertions(+)

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 @@ int dwc3_send_gadget_generic_command(struct dwc3 *dwc, unsigned cmd, u32 param)
 			dwc3_trace(trace_dwc3_gadget,
 					"Command Complete --> %d",
 					DWC3_DGCMD_STATUS(reg));
+			if (DWC3_DGCMD_STATUS(reg))
+				return -EINVAL;
 			return 0;
 		}
 
-- 
1.9.1