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| author | Tomasz Figa <t.figa@samsung.com> | 2012-10-11 10:11:07 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2012-10-15 09:10:10 +0200 |
| commit | 7c367d3da697846b80058859937f606c0081beda (patch) | |
| tree | 4038a22fa5ef2a0d1ae6d2da9a6afb7e38b39278 /drivers/pinctrl/pinctrl-samsung.c | |
| parent | ddffeb8c4d0331609ef2581d84de4d763607bd37 (diff) | |
| download | linux-stable-7c367d3da697846b80058859937f606c0081beda.tar.gz linux-stable-7c367d3da697846b80058859937f606c0081beda.tar.bz2 linux-stable-7c367d3da697846b80058859937f606c0081beda.zip | |
pinctrl: samsung: Detect and handle unsupported configuration types
This patch modifies the pinctrl-samsung driver to detect when width of a
bit field is set to zero (which means that such configuraton type is not
supported) and return an error instead of trying to modify an inexistent
register.
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Thomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/pinctrl-samsung.c')
| -rw-r--r-- | drivers/pinctrl/pinctrl-samsung.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-samsung.c b/drivers/pinctrl/pinctrl-samsung.c index dd108a94acf9..c660fa5071d7 100644 --- a/drivers/pinctrl/pinctrl-samsung.c +++ b/drivers/pinctrl/pinctrl-samsung.c @@ -391,6 +391,9 @@ static int samsung_pinconf_rw(struct pinctrl_dev *pctldev, unsigned int pin, return -EINVAL; } + if (!width) + return -EINVAL; + mask = (1 << width) - 1; shift = pin_offset * width; data = readl(reg_base + cfg_reg); |