Patch "usb: phy: mxs: suspend to RAM causes NULL pointer dereference" has been added to the 4.1-stable tree

Patch "usb: phy: mxs: suspend to RAM causes NULL pointer dereference" has been added to the 4.1-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    usb: phy: mxs: suspend to RAM causes NULL pointer dereference

to the 4.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     usb-phy-mxs-suspend-to-ram-causes-null-pointer-dereference.patch
and it can be found in the queue-4.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 543aa4867d4a2dff5fc11e1b688197ee3bad7f89 Mon Sep 17 00:00:00 2001
From: Stefan Wahren <stefan.wahren@i2se.com>
Date: Mon, 15 Jun 2015 04:37:00 +0000
Subject: usb: phy: mxs: suspend to RAM causes NULL pointer dereference

From: Stefan Wahren <stefan.wahren@i2se.com>

commit 543aa4867d4a2dff5fc11e1b688197ee3bad7f89 upstream.

Triggering suspend to RAM via sysfs on a i.MX28 causes a NULL pointer
dereference. This patch avoids the oops in mxs_phy_get_vbus_status()
by aborting since there is no syscon available.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Fixes: efdbd3a5d6e ("usb: phy: mxs: do not set PWD.RXPWD1PT1 for low speed connection")
Acked-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/usb/phy/phy-mxs-usb.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/usb/phy/phy-mxs-usb.c
+++ b/drivers/usb/phy/phy-mxs-usb.c
@@ -217,6 +217,9 @@ static bool mxs_phy_get_vbus_status(stru
 {
 	unsigned int vbus_value;
 
+	if (!mxs_phy->regmap_anatop)
+		return false;
+
 	if (mxs_phy->port_id == 0)
 		regmap_read(mxs_phy->regmap_anatop,
 			ANADIG_USB1_VBUS_DET_STAT,


Patches currently in stable-queue which might be from stefan.wahren@i2se.com are

queue-4.1/usb-phy-mxs-suspend-to-ram-causes-null-pointer-dereference.patch