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pinctrl: zte: fix 'functions' allocation in zx_pinctrl_build_state()

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It fixes the following Smatch static check warning:

 drivers/pinctrl/zte/pinctrl-zx.c:338 zx_pinctrl_build_state()
 warn: passing devm_ allocated variable to kfree.

As we will be calling krealloc() on pointer 'functions', which means
kfree() will be called in there, devm_kzalloc() shouldn't be used with
the allocation in the first place.  Fix the warning by calling kcalloc()
and managing the free procedure in error path on our own.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: cbff0c4d27 ("pinctrl: add ZTE ZX pinctrl driver support")
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Shawn Guo 2017-07-16 21:33:28 +08:00 committed by Linus Walleij
parent 8939aa5f51
commit bba2e87126
1 changed files with 4 additions and 3 deletions
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7
drivers/pinctrl/zte/pinctrl-zx.c
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@ -295,8 +295,7 @@ static int zx_pinctrl_build_state(struct platform_device *pdev)
pctldev->num_groups = ngroups;
/* Build function list from pin mux functions */
functions = devm_kzalloc(&pdev->dev, info->npins * sizeof(*functions),
GFP_KERNEL);
functions = kcalloc(info->npins, sizeof(*functions), GFP_KERNEL);
if (!functions)
return -ENOMEM;
@ -367,8 +366,10 @@ static int zx_pinctrl_build_state(struct platform_device *pdev)
func->num_group_names *
sizeof(*func->group_names),
GFP_KERNEL);
if (!func->group_names)
if (!func->group_names) {
kfree(functions);
return -ENOMEM;
}
}
group = func->group_names;