kernel/linux
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-11-13 07:31:07 +00:00
Code Issues Releases Packages Activity
linux/drivers/iommu/arm
History
Nicolin Chen 85a1d70b86 iommu/tegra241-cmdqv: Fix alignment failure at max_n_shift 
[ Upstream commit a3799717b8 ]

When configuring a kernel with PAGE_SIZE=4KB, depending on its setting of
CONFIG_CMA_ALIGNMENT, VCMDQ_LOG2SIZE_MAX=19 could fail the alignment test
and trigger a WARN_ON:
    WARNING: at drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c:3646
    Call trace:
     arm_smmu_init_one_queue+0x15c/0x210
     tegra241_cmdqv_init_structures+0x114/0x338
     arm_smmu_device_probe+0xb48/0x1d90

Fix it by capping max_n_shift to CMDQ_MAX_SZ_SHIFT as SMMUv3 CMDQ does.

Fixes: 918eb5c856 ("iommu/arm-smmu-v3: Add in-kernel support for NVIDIA Tegra241 (Grace) CMDQV")
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Link: https://lore.kernel.org/r/20241111030226.1940737-1-nicolinc@nvidia.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-12-05 14:02:13 +01:00
..
arm-smmu iommu/arm-smmu: Clarify MMU-500 CPRE workaround 2024-10-08 18:35:41 +01:00
arm-smmu-v3 iommu/tegra241-cmdqv: Fix alignment failure at max_n_shift 2024-12-05 14:02:13 +01:00
Makefile iommu/arm-smmu: Move Arm SMMU drivers into their own subdirectory 2020-07-27 12:53:10 +01:00