Patch "clk: bcm2835: fix check of error code returned by devm_ioremap_resource()" has been added to the 4.5-stable tree

Patch "clk: bcm2835: fix check of error code returned by devm_ioremap_resource()" has been added to the 4.5-stable tree

[gregkh]

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

    clk: bcm2835: fix check of error code returned by devm_ioremap_resource()

to the 4.5-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:
     clk-bcm2835-fix-check-of-error-code-returned-by-devm_ioremap_resource.patch
and it can be found in the queue-4.5 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 4d3ac6662452060721599a3392bc2f524af984cb Mon Sep 17 00:00:00 2001
From: Vladimir Zapolskiy <vz@mleia.com>
Date: Sun, 6 Mar 2016 03:21:35 +0200
Subject: clk: bcm2835: fix check of error code returned by devm_ioremap_resource()

From: Vladimir Zapolskiy <vz@mleia.com>

commit 4d3ac6662452060721599a3392bc2f524af984cb upstream.

The change fixes potential oops while accessing iomem on invalid
address, if devm_ioremap_resource() fails due to some reason.

The devm_ioremap_resource() function returns ERR_PTR() and never
returns NULL, which makes useless a following check for NULL.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Fixes: 5e63dcc74b30 ("clk: bcm2835: Add a driver for the auxiliary peripheral clock gates")
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/clk/bcm/clk-bcm2835-aux.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/clk/bcm/clk-bcm2835-aux.c
+++ b/drivers/clk/bcm/clk-bcm2835-aux.c
@@ -38,8 +38,8 @@ static int bcm2835_aux_clk_probe(struct
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	reg = devm_ioremap_resource(dev, res);
-	if (!reg)
-		return -ENODEV;
+	if (IS_ERR(reg))
+		return PTR_ERR(reg);
 
 	onecell = devm_kmalloc(dev, sizeof(*onecell), GFP_KERNEL);
 	if (!onecell)


Patches currently in stable-queue which might be from vz@mleia.com are

queue-4.5/clk-bcm2835-fix-check-of-error-code-returned-by-devm_ioremap_resource.patch