From: Zhang Zekun <zhangzekun11@huawei.com> hulk inclusion category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/20607 -------------------------------------------------- Add a lock to protect against the concurrency of PCC operation region. Fixes: 039ec3f73992 ("soc: hisilicon: hisi_hbmdev: Add power domain control methods") Signed-off-by: Zhang Zekun <zhangzekun11@huawei.com> Signed-off-by: Ziming Du <duziming2@huawei.com> --- drivers/soc/hisilicon/hisi_hbmdev.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/soc/hisilicon/hisi_hbmdev.c b/drivers/soc/hisilicon/hisi_hbmdev.c index e60fe1c14c0ff..a7bb386c685d1 100644 --- a/drivers/soc/hisilicon/hisi_hbmdev.c +++ b/drivers/soc/hisilicon/hisi_hbmdev.c @@ -255,7 +255,9 @@ static int memdev_power_on(struct acpi_device *adev) acpi_handle handle = adev->handle; acpi_status status; + acpi_scan_lock_acquire(); status = acpi_evaluate_object(handle, "_ON", NULL, NULL); + acpi_scan_lock_release(); if (ACPI_FAILURE(status)) { acpi_handle_warn(handle, "Power on failed (0x%x)\n", status); return -ENODEV; -- 2.43.0