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platform/x86: intel_pmc_core: Respect error code of kstrtou32_from_user() 

kstrtou32_from_user() may return different error codes on certain
circumstances. Respect all possible values.

While here, move it out of the lock: there is no data access that lock guards.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
This commit is contained in:
Andy Shevchenko 2019-12-18 20:42:29 +02:00
parent e883cafd8d
commit 9592438886
1 changed files with 6 additions and 6 deletions
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12
drivers/platform/x86/intel_pmc_core.c
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@ -629,15 +629,15 @@ static ssize_t pmc_core_ltr_ignore_write(struct file *file, const char __user
struct pmc_dev *pmcdev = &pmc;
const struct pmc_reg_map *map = pmcdev->map;
u32 val, buf_size, fd;
int err = 0;
int err;
buf_size = count < 64 ? count : 64;
mutex_lock(&pmcdev->lock);
if (kstrtou32_from_user(userbuf, buf_size, 10, &val)) {
err = -EFAULT;
goto out_unlock;
}
err = kstrtou32_from_user(userbuf, buf_size, 10, &val);
if (err)
return err;
mutex_lock(&pmcdev->lock);
if (val > map->ltr_ignore_max) {
err = -EINVAL;