iommu/dart: check return value after calling platform_get_resource()

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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: 46d1fb072e ("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>

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Yang Yingliang 2022-04-25 17:08:26 +08:00 • committed by Joerg Roedel

parent e6f48bed2c

commit a15932f437

1 changed files with 4 additions and 5 deletions

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drivers/iommu/apple-dart.c

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