6.15-stable review patch. If anyone has any objections, please let me know.
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From: Robin Murphy robin.murphy@arm.com
[ Upstream commit 860a831de138a7ad6bc86019adaf10eb84c02655 ]
PMU drivers should set .suppress_bind_attrs so that userspace is denied the opportunity to pull the driver out from underneath an in-use PMU (with predictably unpleasant consequences). Somehow both the CMN and NI drivers have managed to miss this; put that right.
Signed-off-by: Robin Murphy robin.murphy@arm.com Reviewed-by: Leo Yan leo.yan@arm.com Link: https://lore.kernel.org/r/acd48c341b33b96804a3969ee00b355d40c546e2.175146529... Signed-off-by: Will Deacon will@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/perf/arm-cmn.c | 1 + drivers/perf/arm-ni.c | 1 + 2 files changed, 2 insertions(+)
diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c index 403850b1040d..e4bf181842fa 100644 --- a/drivers/perf/arm-cmn.c +++ b/drivers/perf/arm-cmn.c @@ -2662,6 +2662,7 @@ static struct platform_driver arm_cmn_driver = { .name = "arm-cmn", .of_match_table = of_match_ptr(arm_cmn_of_match), .acpi_match_table = ACPI_PTR(arm_cmn_acpi_match), + .suppress_bind_attrs = true, }, .probe = arm_cmn_probe, .remove = arm_cmn_remove, diff --git a/drivers/perf/arm-ni.c b/drivers/perf/arm-ni.c index 9396d243415f..c30a67fe2ae3 100644 --- a/drivers/perf/arm-ni.c +++ b/drivers/perf/arm-ni.c @@ -709,6 +709,7 @@ static struct platform_driver arm_ni_driver = { .name = "arm-ni", .of_match_table = of_match_ptr(arm_ni_of_match), .acpi_match_table = ACPI_PTR(arm_ni_acpi_match), + .suppress_bind_attrs = true, }, .probe = arm_ni_probe, .remove = arm_ni_remove,