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platform/x86: asus-wmi: Refactor charge_threshold_store()

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There are few issues with the current code:
 - the error code from kstrtouint() is shadowed
 - the error code from asus_wmi_set_devstate() is ignored
 - the extra check against 0 for count (this is guaranteed by sysfs)

Fix these issues by doing a slight refactoring of charge_threshold_store().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
This commit is contained in:
Andy Shevchenko 2019-08-16 12:46:25 +03:00
parent d507a54f58
commit 84d8e80b0a
1 changed files with 5 additions and 3 deletions
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8
drivers/platform/x86/asus-wmi.c
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@ -2086,13 +2086,15 @@ static ssize_t charge_threshold_store(struct device *dev,
int value, ret, rv;
ret = kstrtouint(buf, 10, &value);
if (ret)
return ret;
if (!count || ret != 0)
return -EINVAL;
if (value < 0 || value > 100)
return -EINVAL;
asus_wmi_set_devstate(ASUS_WMI_CHARGE_THRESHOLD, value, &rv);
ret = asus_wmi_set_devstate(ASUS_WMI_CHARGE_THRESHOLD, value, &rv);
if (!ret)
return ret;
if (rv != 1)
return -EIO;