On 29/06/2022 13:55, Rafael J. Wysocki wrote:
From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Instead of walking the list of children of an ACPI device directly,
use acpi_dev_for_each_child() to carry out an action for all of
the given ACPI device's children.
This will help to eliminate the children list head from struct
acpi_device as it is redundant and it is used in questionable ways
in some places (in particular, locking is needed for walking the
list pointed to it safely, but it is often missing).
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Hi Rafael,
---
drivers/bus/hisi_lpc.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
Index: linux-pm/drivers/bus/hisi_lpc.c
===================================================================
--- linux-pm.orig/drivers/bus/hisi_lpc.c
+++ linux-pm/drivers/bus/hisi_lpc.c
@@ -471,6 +471,12 @@ static int hisi_lpc_acpi_remove_subdev(s
return 0;
}
+static int hisi_lpc_acpi_clear_enumerated(struct acpi_device *adev, void *not_used)
+{
+ acpi_device_clear_enumerated(adev);
+ return 0;
+}
+
struct hisi_lpc_acpi_cell {
const char *hid;
const char *name;
@@ -480,13 +486,11 @@ struct hisi_lpc_acpi_cell {
static void hisi_lpc_acpi_remove(struct device *hostdev)
{
- struct acpi_device *adev = ACPI_COMPANION(hostdev);
struct acpi_device *child;
I got this warn:
drivers/bus/hisi_lpc.c: In function ‘hisi_lpc_acpi_remove’:
drivers/bus/hisi_lpc.c:489:22: warning: unused variable ‘child’
[-Wunused-variable]
489 | struct acpi_device *child;
| ^~~~~
CC drivers/bus/brcmstb_gisb.
With that fixed:
Acked-by: John Garry <john.garry@xxxxxxxxxx>
Can you route this through one of your trees?
device_for_each_child(hostdev, NULL, hisi_lpc_acpi_remove_subdev);
-
- list_for_each_entry(child, &adev->children, node)
- acpi_device_clear_enumerated(child);
+ acpi_dev_for_each_child(ACPI_COMPANION(hostdev),
+ hisi_lpc_acpi_clear_enumerated, NULL);
}
/*
BTW, I don't know why I ever added a remove method for this driver
instead of just setting suppress_bind_attrs....
Thanks,
John
