Rebase on 5.17.8
commit a15932f4 upstream.
It will cause null-ptr-deref in resource_size(), if platform_get_resource() returns NULL, move calling resource_size() after devm_ioremap_resource() that will check 'res' to avoid null-ptr-deref. And use devm_platform_get_and_ioremap_resource() to simplify code.
Fixes: 46d1fb07 ("iommu/dart: Add DART iommu driver") Signed-off-by: Yang Yingliang yangyingliang@huawei.com Reviewed-by: Sven Peter sven@svenpeter.dev Link: https://lore.kernel.org/r/20220425090826.2532165-1-yangyingliang@huawei.com Signed-off-by: Joerg Roedel jroedel@suse.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org