perf: RISC-V: check cpu_hw_evt before dereference in overflow IRQ

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The overflow IRQ handler dereferences cpu_hw_evt before the null check.
Move the check first. Defensive only; the cookie is valid on the normal
path today.

Fixes: a8625217a0 ("drivers/perf: riscv: Implement SBI PMU snapshot function")
Assisted-by: DeepSeek:deepseek-v3
Signed-off-by: Xixin Liu <liuxixin@kylinos.cn>
Link: https://patch.msgid.link/fdd42c791752.v2.1786420235.git.liuxixin@kylinos.cn
Signed-off-by: Paul Walmsley <pjw@kernel.org>

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Xixin Liu 2026-08-11 11:51:00 +08:00 • committed by Paul Walmsley

parent 248dbaf777

commit f643f520c4

1 changed files with 3 additions and 1 deletions

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drivers/perf/riscv_pmu_sbi.c

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