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authorJean-Philippe Brucker <jean-philippe@linaro.org>2020-04-22 10:48:06 +0200
committerWill Deacon <will@kernel.org>2020-05-18 18:22:58 +0100
commit10f6cd2af21bb44faab31a50ec3361d7649e5a39 (patch)
treeece8c289548a2fbc6d53c39e0c249cc7ae5e7b7e /drivers/perf
parent97807325a02b41de2f641d98dda1041549a23cd8 (diff)
pmu/smmuv3: Clear IRQ affinity hint on device removal
Currently when trying to remove the SMMUv3 PMU module we get a WARN_ON_ONCE from free_irq(), because the affinity hint set during probe hasn't been properly cleared. [ 238.878383] WARNING: CPU: 0 PID: 175 at kernel/irq/manage.c:1744 free_irq+0x324/0x358 ... [ 238.897263] Call trace: [ 238.897998] free_irq+0x324/0x358 [ 238.898792] devm_irq_release+0x18/0x28 [ 238.899189] release_nodes+0x1b0/0x228 [ 238.899984] devres_release_all+0x38/0x60 [ 238.900779] device_release_driver_internal+0x10c/0x1d0 [ 238.901574] driver_detach+0x50/0xe0 [ 238.902368] bus_remove_driver+0x5c/0xd8 [ 238.903448] driver_unregister+0x30/0x60 [ 238.903958] platform_driver_unregister+0x14/0x20 [ 238.905075] arm_smmu_pmu_exit+0x1c/0xecc [arm_smmuv3_pmu] [ 238.905547] __arm64_sys_delete_module+0x14c/0x260 [ 238.906342] el0_svc_common.constprop.0+0x74/0x178 [ 238.907355] do_el0_svc+0x24/0x90 [ 238.907932] el0_sync_handler+0x11c/0x198 [ 238.908979] el0_sync+0x158/0x180 Just like the other perf drivers, clear the affinity hint before releasing the device. Fixes: 7d839b4b9e00 ("perf/smmuv3: Add arm64 smmuv3 pmu driver") Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org> Link: https://lore.kernel.org/r/20200422084805.237738-1-jean-philippe@linaro.org Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers/perf')
-rw-r--r--drivers/perf/arm_smmuv3_pmu.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/perf/arm_smmuv3_pmu.c b/drivers/perf/arm_smmuv3_pmu.c
index f01a57e5a5f3..48e28ef93a70 100644
--- a/drivers/perf/arm_smmuv3_pmu.c
+++ b/drivers/perf/arm_smmuv3_pmu.c
@@ -814,7 +814,7 @@ static int smmu_pmu_probe(struct platform_device *pdev)
if (err) {
dev_err(dev, "Error %d registering hotplug, PMU @%pa\n",
err, &res_0->start);
- return err;
+ goto out_clear_affinity;
}
err = perf_pmu_register(&smmu_pmu->pmu, name, -1);
@@ -833,6 +833,8 @@ static int smmu_pmu_probe(struct platform_device *pdev)
out_unregister:
cpuhp_state_remove_instance_nocalls(cpuhp_state_num, &smmu_pmu->node);
+out_clear_affinity:
+ irq_set_affinity_hint(smmu_pmu->irq, NULL);
return err;
}
@@ -842,6 +844,7 @@ static int smmu_pmu_remove(struct platform_device *pdev)
perf_pmu_unregister(&smmu_pmu->pmu);
cpuhp_state_remove_instance_nocalls(cpuhp_state_num, &smmu_pmu->node);
+ irq_set_affinity_hint(smmu_pmu->irq, NULL);
return 0;
}