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iommu: Check for iommu_ops == NULL in iommu_probe_device()

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This check needs to be there and got lost at some point
during development. Add it again.

Fixes: 641fb0efbff0 ('iommu/of: Don't call iommu_ops->add_device directly')
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reported-by: kernelci.org bot <bot@kernelci.org>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel 2018-12-20 10:02:20 +01:00
parent d2e1a003af
commit dc9de8a2b2
1 changed files with 5 additions and 1 deletions
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6
drivers/iommu/iommu.c
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@ -114,10 +114,14 @@ void iommu_device_unregister(struct iommu_device *iommu)
int iommu_probe_device(struct device *dev)
{
const struct iommu_ops *ops = dev->bus->iommu_ops;
int ret = -EINVAL;
WARN_ON(dev->iommu_group);
return ops->add_device(dev);
if (ops)
ret = ops->add_device(dev);
return ret;
}
void iommu_release_device(struct device *dev)