iommu: Remove extra NULL check when call strtobool()

strtobool() does check for NULL parameter already. No need to repeat.

While here, switch to kstrtobool() and unshadow actual error code
(which is still -EINVAL).

No functional change intended.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Andy Shevchenko 2018-05-14 19:22:25 +03:00 committed by Joerg Roedel
parent 48e6f7652d
commit 7f9584df84

View file

@ -116,9 +116,11 @@ static void __iommu_detach_group(struct iommu_domain *domain,
static int __init iommu_set_def_domain_type(char *str)
{
bool pt;
int ret;
if (!str || strtobool(str, &pt))
return -EINVAL;
ret = kstrtobool(str, &pt);
if (ret)
return ret;
iommu_def_domain_type = pt ? IOMMU_DOMAIN_IDENTITY : IOMMU_DOMAIN_DMA;
return 0;