[PW_SID:1058932] iommu/riscv: Stop polling when CQCSR reports an error#1516
[PW_SID:1058932] iommu/riscv: Stop polling when CQCSR reports an error#1516linux-riscv-bot wants to merge 1 commit into
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The cmdq wait loop busy-polls the consumer index until it advances or the software timeout expires. If the IOMMU has already signaled a command queue failure in CQCSR, continuing to poll for progress is pointless. Make riscv_iommu_queue_wait() also terminate the poll when any of these CQCSR error bits are observed. This helps the caller return earlier in failure cases and avoids spinning until the full timeout interval when the hardware has already reported an error. On single-core systems in particular, the current busy-wait can delay servicing the command-timeout interrupt until the software timeout expires (90s by default). Fixes: 856c0cf ("iommu/riscv: Command and fault queue support") Signed-off-by: Fangyu Yu <fangyu.yu@linux.alibaba.com> Signed-off-by: Linux RISC-V bot <linux.riscv.bot@gmail.com>
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Patch 1: "iommu/riscv: Stop polling when CQCSR reports an error" |
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Patch 1: "iommu/riscv: Stop polling when CQCSR reports an error" |
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Patch 1: "iommu/riscv: Stop polling when CQCSR reports an error" |
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Patch 1: "iommu/riscv: Stop polling when CQCSR reports an error" |
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Patch 1: "iommu/riscv: Stop polling when CQCSR reports an error" |
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Patch 1: "iommu/riscv: Stop polling when CQCSR reports an error" |
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Patch 1: "iommu/riscv: Stop polling when CQCSR reports an error" |
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Patch 1: "iommu/riscv: Stop polling when CQCSR reports an error" |
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Patch 1: "iommu/riscv: Stop polling when CQCSR reports an error" |
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Patch 1: "iommu/riscv: Stop polling when CQCSR reports an error" |
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Patch 1: "iommu/riscv: Stop polling when CQCSR reports an error" |
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Patch 1: "iommu/riscv: Stop polling when CQCSR reports an error" |
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PR for series 1058932 applied to workflow__riscv__fixes
Name: iommu/riscv: Stop polling when CQCSR reports an error
URL: https://patchwork.kernel.org/project/linux-riscv/list/?series=1058932
Version: 1