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ACPI: scan: switch to flags for acpi_scan_check_and_detach()

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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@intel.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Tested-by: Miguel Luis <miguel.luis@oracle.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/20240529133446.28446-10-Jonathan.Cameron@huawei.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Jonathan Cameron 2024-05-29 14:34:36 +01:00 committed by Catalin Marinas
parent b398a91dec
commit 1859a671bd
1 changed files with 12 additions and 5 deletions
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17
drivers/acpi/scan.c
View file

@ -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);