From: Paul Zimmerman <Paul.Zimmerman@synopsys.com>
Date: Fri, 25 Apr 2014 21:18:13 +0000 (-0700)
Subject: usb: dwc2: fix sparse warning
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=d5dbd3f7d82223b59dc2200c0e9f4f95665a21a4;p=openwrt%2Fstaging%2Fblogic.git

usb: dwc2: fix sparse warning

Sparse warns about the __le16 wValue from the USB SetAddress
command being used without converting it to CPU endianness. Fix
that, and also add a bit of defensive masking of the received
wValue before using it.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index dc0faee031fb..2057c380969e 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -1094,7 +1094,8 @@ static void s3c_hsotg_process_control(struct s3c_hsotg *hsotg,
 			s3c_hsotg_disconnect(hsotg);
 			dcfg = readl(hsotg->regs + DCFG);
 			dcfg &= ~DCFG_DEVADDR_MASK;
-			dcfg |= ctrl->wValue << DCFG_DEVADDR_SHIFT;
+			dcfg |= (le16_to_cpu(ctrl->wValue) <<
+				 DCFG_DEVADDR_SHIFT) & DCFG_DEVADDR_MASK;
 			writel(dcfg, hsotg->regs + DCFG);
 
 			dev_info(hsotg->dev, "new address %d\n", ctrl->wValue);