From b096d2211a059f6b22f089e3907e061409dbb6c5 Mon Sep 17 00:00:00 2001
From: Daniel Mack <zonque@gmail.com>
Date: Wed, 21 Aug 2013 11:17:21 +0200
Subject: [PATCH] usb: ehci-mxc: check for pdata before dereferencing
commit f375fc520d4df0cd9fcb570f33c103c6c0311f9e upstream.
Commit 7e8d5cd93fac ("USB: Add EHCI support for MX27 and MX31 based
boards") introduced code that could potentially lead to a NULL pointer
dereference on driver removal.
Fix this by checking for the value of pdata before dereferencing it.
Signed-off-by: Daniel Mack <zonque@gmail.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/host/ehci-mxc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/host/ehci-mxc.c b/drivers/usb/host/ehci-mxc.c
index c369767b00e2..ec128bc72deb 100644
--- a/drivers/usb/host/ehci-mxc.c
+++ b/drivers/usb/host/ehci-mxc.c
@@ -184,7 +184,7 @@ static int ehci_mxc_drv_remove(struct platform_device *pdev)
if (pdata && pdata->exit)
pdata->exit(pdev);
- if (pdata->otg)
+ if (pdata && pdata->otg)
usb_phy_shutdown(pdata->otg);
clk_disable_unprepare(priv->usbclk);
--
2.34.1