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| author | Tony Lindgren <tony@atomide.com> | 2012-01-20 07:43:53 -0800 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2012-01-26 14:13:05 +0100 |
| commit | 9e2551e10b5c7ba550849bd9ed519e498cc30e68 (patch) | |
| tree | e84e7f61908463ac052faffeca40796d77e5030f /drivers/pinctrl/pinmux.c | |
| parent | de849eecd0addaa6bf60f2f7be36b30abf9ff2ae (diff) | |
| download | linux-9e2551e10b5c7ba550849bd9ed519e498cc30e68.tar.gz linux-9e2551e10b5c7ba550849bd9ed519e498cc30e68.tar.bz2 linux-9e2551e10b5c7ba550849bd9ed519e498cc30e68.zip | |
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>
Diffstat (limited to 'drivers/pinctrl/pinmux.c')
| -rw-r--r-- | drivers/pinctrl/pinmux.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/pinctrl/pinmux.c b/drivers/pinctrl/pinmux.c index f4f8c7e4b1c8..3ffa9324ed82 100644 --- a/drivers/pinctrl/pinmux.c +++ b/drivers/pinctrl/pinmux.c @@ -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) |