[SRU][N:linux-azure-nvidia][PATCH 0/4] iommu NULL pointer dereference in tegra241_vintf_alloc_lvcmdq

[John Cabaj]

BugLink: https://bugs.launchpad.net/bugs/2097573

SRU Justification

[Impact]

* Patches pulled from upstream for CMDQV support introduce null pointer dereference on Grace hardware

[Fix]

* 4 clean cherry-picks from upstream
* All but one commits are tagged as Fixes: 918eb5c856f6 ("iommu/arm-smmu-v3: Add in-kernel support for NVIDIA Tegra241 (Grace) CMDQV"), which was introduced in https://bugs.launchpad.net/bugs/2097573
* Additional commit to ensure clean cherry-picks of other patches

[Test Plan]

* Compile tested
* Boot tested
* Tested on Grace Hopper hardware

[Regression potential]

* Regression risk low as patches are self-contained to drivers/iommu/arm/arm-smmu-v3 and are upstream and tested

Dan Carpenter (1):
  iommu/tegra241-cmdqv: Fix ioremap() error handling in probe()

Luis Claudio R. Goncalves (1):
  iommu/tegra241-cmdqv: do not use smp_processor_id in preemptible
    context

Nicolin Chen (2):
  iommu/tegra241-cmdqv: Drop static at local variable
  iommu/tegra241-cmdqv: Do not allocate vcmdq until
    dma_set_mask_and_coherent

 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c   |  9 +-
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h   |  1 +
 .../iommu/arm/arm-smmu-v3/tegra241-cmdqv.c    | 93 +++++++++++--------
 3 files changed, 65 insertions(+), 38 deletions(-)

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2.43.0