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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2023-09-27 23:17:25 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2023-09-29 13:40:35 +0300
commit2e57d10a6591560724b80a628235559571f4cb8d (patch)
tree9ea4fa8e8e9ff7a4c1a075511cddd767497ac3b0 /include/acpi
parent3e7d6f396d74a3e40c390bb53947938957426097 (diff)
downloadlinux-2e57d10a6591560724b80a628235559571f4cb8d.tar.xz
ACPI: utils: Dynamically determine acpi_handle_list size
Address a long-standing "TBD" comment in the ACPI headers regarding the number of handles in struct acpi_handle_list. The number 10, which along with the comment dates back to 2.4.23, seems like it may have been arbitrarily chosen and isn't sufficient in all cases [1]. Finally change the code to dynamically determine the size of the handles table in struct acpi_handle_list and allocate it accordingly. Update the users of to struct acpi_handle_list to take the additional dynamic allocation into account. Link: https://lore.kernel.org/linux-acpi/20230809094451.15473-1-ivan.hu@canonical.com # [1] Co-developed-by: Vicki Pfau <vi@endrift.com> Signed-off-by: Vicki Pfau <vi@endrift.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/acpi')
-rw-r--r--include/acpi/acpi_bus.h9
1 files changed, 6 insertions, 3 deletions
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 254685085c82..9920611a6faa 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -12,11 +12,9 @@
#include <linux/device.h>
#include <linux/property.h>
-/* TBD: Make dynamic */
-#define ACPI_MAX_HANDLES 10
struct acpi_handle_list {
u32 count;
- acpi_handle handles[ACPI_MAX_HANDLES];
+ acpi_handle* handles;
};
/* acpi_utils.h */
@@ -32,6 +30,11 @@ acpi_evaluate_reference(acpi_handle handle,
acpi_string pathname,
struct acpi_object_list *arguments,
struct acpi_handle_list *list);
+bool acpi_handle_list_equal(struct acpi_handle_list *list1,
+ struct acpi_handle_list *list2);
+void acpi_handle_list_replace(struct acpi_handle_list *dst,
+ struct acpi_handle_list *src);
+void acpi_handle_list_free(struct acpi_handle_list *list);
acpi_status
acpi_evaluate_ost(acpi_handle handle, u32 source_event, u32 status_code,
struct acpi_buffer *status_buf);