iommu: Check dev->iommu in iommu_dev_xxx functions

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[ Upstream commit b9abb19fa5 ]

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: a3a195929d ("iommu: Add APIs for multiple domains per device")
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/20210303173611.520-1-shameerali.kolothum.thodi@huawei.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Shameer Kolothum 2021-03-03 17:36:11 +00:00 • committed by Greg Kroah-Hartman

parent 3d15bf2b2c

commit b60e13c306

1 changed files with 15 additions and 9 deletions

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drivers/iommu/iommu.c

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