Commit 9e2551e1 authored Jan 20, 2012 by Tony Lindgren Committed by Linus Walleij Jan 26, 2012

pinctrl: fix pinmux_hog_maps when ctrl_dev_name is not set



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@atomide.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

parent de849eec

drivers/pinctrl/pinmux.c

+6 −3

Original line number	Diff line number	Diff line
		@@ -978,9 +978,12 @@ int pinmux_hog_maps(struct pinctrl_dev *pctldev)
		for (i = 0; i < pinmux_maps_num; i++) {
		struct pinmux_map const *map = &pinmux_maps[i];

		if (((map->ctrl_dev == dev) \|\|
		!strcmp(map->ctrl_dev_name, devname)) &&
		map->hog_on_boot) {
		if (!map->hog_on_boot)
		continue;

		if ((map->ctrl_dev == dev) \|\|
		(map->ctrl_dev_name &&
		!strcmp(map->ctrl_dev_name, devname))) {
		/* OK time to hog! */
		ret = pinmux_hog_map(pctldev, map);
		if (ret)