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| author | Robin Murphy <robin.murphy@arm.com> | 2025-05-12 18:11:54 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-06-04 14:40:25 +0200 |
| commit | 3939280be98ed943eb2a7b7fc74a3e77e061a213 (patch) | |
| tree | 24cd87c1d0acc327fb5318a51b99b6388c6902b6 /drivers/perf | |
| parent | 05b21a536a7149d3678eda8148e608e14b0ea4e2 (diff) | |
| download | linux-3939280be98ed943eb2a7b7fc74a3e77e061a213.tar.gz linux-3939280be98ed943eb2a7b7fc74a3e77e061a213.tar.bz2 linux-3939280be98ed943eb2a7b7fc74a3e77e061a213.zip | |
perf/arm-cmn: Initialise cmn->cpu earlier
commit 597704e201068db3d104de3c7a4d447ff8209127 upstream.
For all the complexity of handling affinity for CPU hotplug, what we've
apparently managed to overlook is that arm_cmn_init_irqs() has in fact
always been setting the *initial* affinity of all IRQs to CPU 0, not the
CPU we subsequently choose for event scheduling. Oh dear.
Cc: stable@vger.kernel.org
Fixes: 0ba64770a2f2 ("perf: Add Arm CMN-600 PMU driver")
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Link: https://lore.kernel.org/r/b12fccba6b5b4d2674944f59e4daad91cd63420b.1747069914.git.robin.murphy@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/perf')
| -rw-r--r-- | drivers/perf/arm-cmn.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c index a884835f6830..b2e0a79254f1 100644 --- a/drivers/perf/arm-cmn.c +++ b/drivers/perf/arm-cmn.c @@ -2313,6 +2313,7 @@ static int arm_cmn_probe(struct platform_device *pdev) cmn->dev = &pdev->dev; cmn->part = (unsigned long)device_get_match_data(cmn->dev); + cmn->cpu = cpumask_local_spread(0, dev_to_node(cmn->dev)); platform_set_drvdata(pdev, cmn); if (cmn->part == PART_CMN600 && has_acpi_companion(cmn->dev)) { @@ -2340,7 +2341,6 @@ static int arm_cmn_probe(struct platform_device *pdev) if (err) return err; - cmn->cpu = cpumask_local_spread(0, dev_to_node(cmn->dev)); cmn->pmu = (struct pmu) { .module = THIS_MODULE, .attr_groups = arm_cmn_attr_groups, |