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| author | Luis Claudio R. Goncalves <[email protected]> | 2024-12-06 13:01:14 +0000 |
|---|---|---|
| committer | Will Deacon <[email protected]> | 2024-12-09 23:38:30 +0000 |
| commit | 1f806218164d1bb93f3db21eaf61254b08acdf03 (patch) | |
| tree | 5c3ace523f1484647b955fc915bc24aad40e650b /drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | |
| parent | Linux 6.13-rc2 (diff) | |
| download | kernel-1f806218164d1bb93f3db21eaf61254b08acdf03.tar.gz kernel-1f806218164d1bb93f3db21eaf61254b08acdf03.zip | |
iommu/tegra241-cmdqv: do not use smp_processor_id in preemptible context
During boot some of the calls to tegra241_cmdqv_get_cmdq() will happen
in preemptible context. As this function calls smp_processor_id(), if
CONFIG_DEBUG_PREEMPT is enabled, these calls will trigger a series of
"BUG: using smp_processor_id() in preemptible" backtraces.
As tegra241_cmdqv_get_cmdq() only calls smp_processor_id() to use the
CPU number as a factor to balance out traffic on cmdq usage, it is safe
to use raw_smp_processor_id() here.
Cc: <[email protected]>
Fixes: 918eb5c856f6 ("iommu/arm-smmu-v3: Add in-kernel support for NVIDIA Tegra241 (Grace) CMDQV")
Signed-off-by: Luis Claudio R. Goncalves <[email protected]>
Reviewed-by: Jason Gunthorpe <[email protected]>
Reviewed-by: Nicolin Chen <[email protected]>
Tested-by: Nicolin Chen <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Will Deacon <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c')
0 files changed, 0 insertions, 0 deletions