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authorJohn Crispin <blogic@openwrt.org>2012-04-23 19:01:58 +0200
committerLinus Walleij <linus.walleij@linaro.org>2012-04-24 15:09:50 +0200
commit15f70e1b9a1a6351c252cb8892272cc4601818c7 (patch)
tree97d38f59d412ca6f001f0674652958f0790466a9 /drivers/pinctrl/pinmux.c
parentdcb5dbc305b975cccf40942feba40964069541d3 (diff)
downloadlinux-15f70e1b9a1a6351c252cb8892272cc4601818c7.tar.bz2
pinctrl: fix signed vs unsigned conditionals inside pinmux_map_to_setting
pinmux_map_to_setting() uses setting->data.mux.func/group to store the return code of pinmux_func_name_to_selector/pinctrl_get_group_selector(). However, struct pinctrl_setting_mux defines these elements as unsigned, resulting in all error codes getting lost. The conditionals following the assignments will always evaluate to false thus breaking the error paths. This bug can be triggered by loading a pinmux group map from the devicetree with an invalid function/group string. Signed-off-by: John Crispin <blogic@openwrt.org> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Acked-by: Dong Aisheng <dong.aisheng@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/pinmux.c')
-rw-r--r--drivers/pinctrl/pinmux.c15
1 files changed, 8 insertions, 7 deletions
diff --git a/drivers/pinctrl/pinmux.c b/drivers/pinctrl/pinmux.c
index fa0357bd88ff..7cd0c7d0f2cf 100644
--- a/drivers/pinctrl/pinmux.c
+++ b/drivers/pinctrl/pinmux.c
@@ -329,10 +329,10 @@ int pinmux_map_to_setting(struct pinctrl_map const *map,
return -EINVAL;
}
- setting->data.mux.func =
- pinmux_func_name_to_selector(pctldev, map->data.mux.function);
- if (setting->data.mux.func < 0)
- return setting->data.mux.func;
+ ret = pinmux_func_name_to_selector(pctldev, map->data.mux.function);
+ if (ret < 0)
+ return ret;
+ setting->data.mux.func = ret;
ret = pmxops->get_function_groups(pctldev, setting->data.mux.func,
&groups, &num_groups);
@@ -356,9 +356,10 @@ int pinmux_map_to_setting(struct pinctrl_map const *map,
group = groups[0];
}
- setting->data.mux.group = pinctrl_get_group_selector(pctldev, group);
- if (setting->data.mux.group < 0)
- return setting->data.mux.group;
+ ret = pinctrl_get_group_selector(pctldev, group);
+ if (ret < 0)
+ return ret;
+ setting->data.mux.group = ret;
ret = pctlops->get_group_pins(pctldev, setting->data.mux.group, &pins,
&num_pins);