[PATCH AUTOSEL 5.4 13/50] perf/smmuv3: Use platform_get_irq_optional() for wired interrupt
From: Sasha Levin <sashal@kernel.org>
Date: 2020-02-23 02:33:29
Also in:
lkml, stable
Subsystem:
arm pmu profiling and debugging, the rest · Maintainers:
Will Deacon, Mark Rutland, Linus Torvalds
From: John Garry <redacted> [ Upstream commit 0ca2c0319a7bce0e152b51b866979d62dc261e48 ] Even though a SMMUv3 PMCG implementation may use an MSI as the form of interrupt source, the kernel would still complain that it does not find the wired (GSIV) interrupt in this case: root@(none)$ dmesg | grep arm-smmu-v3-pmcg | grep "not found" [ 59.237219] arm-smmu-v3-pmcg arm-smmu-v3-pmcg.8.auto: IRQ index 0 not found [ 59.322841] arm-smmu-v3-pmcg arm-smmu-v3-pmcg.9.auto: IRQ index 0 not found [ 59.422155] arm-smmu-v3-pmcg arm-smmu-v3-pmcg.10.auto: IRQ index 0 not found [ 59.539014] arm-smmu-v3-pmcg arm-smmu-v3-pmcg.11.auto: IRQ index 0 not found [ 59.640329] arm-smmu-v3-pmcg arm-smmu-v3-pmcg.12.auto: IRQ index 0 not found [ 59.743112] arm-smmu-v3-pmcg arm-smmu-v3-pmcg.13.auto: IRQ index 0 not found [ 59.880577] arm-smmu-v3-pmcg arm-smmu-v3-pmcg.14.auto: IRQ index 0 not found [ 60.017528] arm-smmu-v3-pmcg arm-smmu-v3-pmcg.15.auto: IRQ index 0 not found Use platform_get_irq_optional() to silence the warning. If neither interrupt source is found, then the driver will still warn that IRQ setup errored and the probe will fail. Reviewed-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: John Garry <redacted> Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/perf/arm_smmuv3_pmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/perf/arm_smmuv3_pmu.c b/drivers/perf/arm_smmuv3_pmu.c
index 191f410cf35cd..2f8787276d9b8 100644
--- a/drivers/perf/arm_smmuv3_pmu.c
+++ b/drivers/perf/arm_smmuv3_pmu.c@@ -772,7 +772,7 @@ static int smmu_pmu_probe(struct platform_device *pdev) smmu_pmu->reloc_base = smmu_pmu->reg_base; } - irq = platform_get_irq(pdev, 0); + irq = platform_get_irq_optional(pdev, 0); if (irq > 0) smmu_pmu->irq = irq;
--
2.20.1
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