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 <liuqi115@huawei.com>
Link: https://lore.kernel.org/r/1612252686-50329-1-git-send-email-liuqi115@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>

diff --git a/drivers/perf/arm_dmc620_pmu.c b/drivers/perf/arm_dmc620_pmu.c
index 27f54c0..66ad5b3 100644 (file)
--- 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,