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pinctrl: remove mutex lock in groups show 

Mutex is locked duplicatly by pinconf_groups_show() and
pin_config_group_get(). It results dead lock. So avoid to lock mutex
in pinconf_groups_show().

Cc: stable@kernel.org
Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Haojian Zhuang 2012-10-18 17:07:01 +08:00 committed by Linus Walleij
parent a03690e444
commit 7ae9d71e8d
1 changed files with 0 additions and 4 deletions
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4
drivers/pinctrl/pinconf.c
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@ -537,8 +537,6 @@ static int pinconf_groups_show(struct seq_file *s, void *what)
seq_puts(s, "Pin config settings per pin group\n");
seq_puts(s, "Format: group (name): configs\n");
mutex_lock(&pinctrl_mutex);
while (selector < ngroups) {
const char *gname = pctlops->get_group_name(pctldev, selector);
@ -549,8 +547,6 @@ static int pinconf_groups_show(struct seq_file *s, void *what)
selector++;
}
mutex_unlock(&pinctrl_mutex);
return 0;
}