Commit 6f2b4e58 authored by Zhang Zekun's avatar Zhang Zekun
Browse files

soc: hisilicon: Don't poweroff if memblocks don't offlined 

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I9W022



------------------------------------

We can not determine which physical_node can be offlined. There
could be pages pinned by user space. when we try to offline a
memblock on which has already pinned pages, we will fall into a
loop to migrate these pinned pages.

Fixes: 039ec3f7 ("soc: hisilicon: hisi_hbmdev: Add power domain control methods")
Signed-off-by: default avatarZhang Zekun <zhangzekun11@huawei.com>
parent 9c0bbeee

drivers/soc/hisilicon/hisi_hbmdev.c

+5 −3
Original line number Diff line number Diff line
@@ -301,14 +301,16 @@ static ssize_t state_store(struct device *dev, struct device_attribute *attr, 
}

static DEVICE_ATTR_WO(state);



static int hbmdev_find(struct acpi_device *adev, void *arg)

static int hbmdev_setup(struct acpi_device *adev, void *arg)

{

	const char *hid = acpi_device_hid(adev);

	bool *found = arg;



	if (!strcmp(hid, ACPI_MEMORY_DEVICE_HID)) {

		acpi_scan_lock_acquire();

		adev->handler->hotplug.demand_offline = true;

		acpi_scan_lock_release();

		*found = true;

		return -1;

	}



	return 0;
@@ -323,7 +325,7 @@ static bool has_hbmdev(struct device *dev) 
	if (strcmp(hid, ACPI_GENERIC_CONTAINER_DEVICE_HID))

		return found;



	acpi_dev_for_each_child(adev, hbmdev_find, &found);

	acpi_dev_for_each_child(adev, hbmdev_setup, &found);



	return found;

}