2021-02-02 08:03:21

by liuqi (BA)

Subject: [PATCH] drivers/perf: Prevent forced unbinding of ARM_DMC620_PMU drivers

Set "suppress_bind_attrs" to true, so that bind/unbind can be
disabled via sysfs and prevent unbinding ARM_DMC620_PMU drivers
during perf sampling.

Signed-off-by: Qi Liu <[email protected]>
---
drivers/perf/arm_dmc620_pmu.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/perf/arm_dmc620_pmu.c b/drivers/perf/arm_dmc620_pmu.c
index 27f54c0..66ad5b3 100644
--- a/drivers/perf/arm_dmc620_pmu.c
+++ b/drivers/perf/arm_dmc620_pmu.c
@@ -717,6 +717,7 @@ static struct platform_driver dmc620_pmu_driver = {
.driver = {
.name = DMC620_DRVNAME,
.acpi_match_table = dmc620_acpi_match,
+ .suppress_bind_attrs = true,
},
.probe = dmc620_pmu_device_probe,
.remove = dmc620_pmu_device_remove,
--
2.8.1

2021-02-03 00:53:00

by Will Deacon

Subject: Re: [PATCH] drivers/perf: Prevent forced unbinding of ARM_DMC620_PMU drivers

On Tue, 2 Feb 2021 15:58:06 +0800, Qi Liu wrote:
> Set "suppress_bind_attrs" to true, so that bind/unbind can be
> disabled via sysfs and prevent unbinding ARM_DMC620_PMU drivers
> during perf sampling.

Applied to will (for-next/perf), thanks!

[1/1] drivers/perf: Prevent forced unbinding of ARM_DMC620_PMU drivers
https://git.kernel.org/will/c/20116dd93f4d

Cheers,
--
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev