linux-kernel - RE: [PATCH 2/4] pinctrl: Fix pinmux_hog_maps when ctrl_dev

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Date:	Tue, 24 Jan 2012 16:47:38 -0800
From:	Stephen Warren <swarren@...dia.com>
To:	Tony Lindgren <tony@...mide.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Linus Walleij <linus.walleij@...ricsson.com>,
	Barry Song <21cnbao@...il.com>,
	Haojian Zhuang <haojian.zhuang@...vell.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Thomas Abraham <thomas.abraham@...aro.org>,
	Rajendra Nayak <rajendra.nayak@...aro.org>,
	Dong Aisheng <dong.aisheng@...aro.org>,
	Shawn Guo <shawn.guo@...escale.com>
Subject: RE: [PATCH 2/4] pinctrl: Fix pinmux_hog_maps when ctrl_dev_name is
 not set

Tony Lindgren wrote at Tuesday, January 24, 2012 5:24 PM:
...
> The ctrl_dev_name is optional for struct pinmux_map assuming
> that ctrl_dev is set. Without this patch we can get:
> 
> Unable to handle kernel NULL pointer dereference at virtual address 00000000
> ...
> (pinmux_hog_maps+0xa4/0x20c)
> (pinctrl_register+0x2a4/0x378)
> ...
> 
> Fix this by adding adding a test for map->ctrl_dev.
> Additionally move the test for map->ctrl_dev earlier
> to optimize out the loop a bit.
> 
> Signed-off-by: Tony Lindgren <tony@...mide.com>

Acked-by: Stephen Warren <swarren@...dia.com>

-- 
nvpublic

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