[PATCH v10 09/19] ACPI: scan: switch to flags for acpi_scan_check_and_detach()

From: Jonathan Cameron
Date: Wed May 29 2024 - 09:40:01 EST


Precursor patch adds the ability to pass a uintptr_t of flags into
acpi_scan_check_and detach() so that additional flags can be
added to indicate whether to defer portions of the eject flow.
The new flag follows in the next patch.

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Reviewed-by: Hanjun Guo <guohanjun@xxxxxxxxxx>
Reviewed-by: Gavin Shan <gshan@xxxxxxxxxx>
Tested-by: Miguel Luis <miguel.luis@xxxxxxxxxx>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
---
drivers/acpi/scan.c | 17 ++++++++++++-----
1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 503773707e01..4d649ce5876f 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -243,13 +243,16 @@ static int acpi_scan_try_to_offline(struct acpi_device *device)
return 0;
}

-static int acpi_scan_check_and_detach(struct acpi_device *adev, void *check)
+#define ACPI_SCAN_CHECK_FLAG_STATUS BIT(0)
+
+static int acpi_scan_check_and_detach(struct acpi_device *adev, void *p)
{
struct acpi_scan_handler *handler = adev->handler;
+ uintptr_t flags = (uintptr_t)p;

- acpi_dev_for_each_child_reverse(adev, acpi_scan_check_and_detach, check);
+ acpi_dev_for_each_child_reverse(adev, acpi_scan_check_and_detach, p);

- if (check) {
+ if (flags & ACPI_SCAN_CHECK_FLAG_STATUS) {
acpi_bus_get_status(adev);
/*
* Skip devices that are still there and take the enabled
@@ -287,7 +290,9 @@ static int acpi_scan_check_and_detach(struct acpi_device *adev, void *check)

static void acpi_scan_check_subtree(struct acpi_device *adev)
{
- acpi_scan_check_and_detach(adev, (void *)true);
+ uintptr_t flags = ACPI_SCAN_CHECK_FLAG_STATUS;
+
+ acpi_scan_check_and_detach(adev, (void *)flags);
}

static int acpi_scan_hot_remove(struct acpi_device *device)
@@ -2596,7 +2601,9 @@ EXPORT_SYMBOL(acpi_bus_scan);
*/
void acpi_bus_trim(struct acpi_device *adev)
{
- acpi_scan_check_and_detach(adev, NULL);
+ uintptr_t flags = 0;
+
+ acpi_scan_check_and_detach(adev, (void *)flags);
}
EXPORT_SYMBOL_GPL(acpi_bus_trim);

--
2.39.2