iommu/qcom: Check pm_runtime_resume_and_get() return in probe

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The SMMU_INTR_SEL_NS register write in qcom_iommu_device_probe() uses
pm_runtime_get_sync() without checking the return value. If runtime
resume fails the subsequent writel_relaxed() would access hardware with
clocks potentially disabled.

Switch to pm_runtime_resume_and_get() which handles the usage-count
cleanup on failure, check the return value, and unwind the already
registered iommu device on error.

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Mukesh Ojha <mukesh.ojha@oss.qualcomm.com>
Signed-off-by: Will Deacon <will@kernel.org>

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Mukesh Ojha 2026-07-17 20:16:05 +05:30 • committed by Will Deacon

parent bf69e515b1

commit e910315ae0

1 changed files with 5 additions and 1 deletions

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drivers/iommu/arm/arm-smmu/qcom_iommu.c

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