[Linuxarm] Re: [PATCH v3] iommu: Check dev->iommu in iommu_dev_xxx functions

On Wed, Mar 03, 2021 at 05:36:11PM +0000, Shameer Kolothum wrote:

The device iommu probe/attach might have failed leaving dev->iommu to NULL and device drivers may still invoke these functions resulting in a crash in iommu vendor driver code.

Hence make sure we check that.

Fixes: a3a195929d40 ("iommu: Add APIs for multiple domains per device") Signed-off-by: Shameer Kolothum shameerali.kolothum.thodi@huawei.com

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v2 --> v3 -Removed iommu_ops from struct dev_iommu. v1 --> v2: -Added iommu_ops to struct dev_iommu based on the discussion with Robin.

-Rebased against iommu-tree core branch.

drivers/iommu/iommu.c | 24 +++++++++++++++--------- 1 file changed, 15 insertions(+), 9 deletions(-)

Applied, thanks.