Replace the wmi_block.read_takes_no_args bool field with
an unsigned long flags field, used together with test_bit()
and friends.
This is a preparation patch for fixing a driver->notify() vs ->probe()
race, which requires atomic flag handling.
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
drivers/platform/x86/wmi.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c
index c34341f4da76..46178e03aeca 100644
--- a/drivers/platform/x86/wmi.c
+++ b/drivers/platform/x86/wmi.c
@@ -57,6 +57,10 @@ static_assert(sizeof(typeof_member(struct guid_block, guid)) == 16);
static_assert(sizeof(struct guid_block) == 20);
static_assert(__alignof__(struct guid_block) == 1);
+enum { /* wmi_block flags */
+ WMI_READ_TAKES_NO_ARGS,
+};
+
struct wmi_block {
struct wmi_device dev;
struct list_head list;
@@ -67,8 +71,7 @@ struct wmi_block {
wmi_notify_handler handler;
void *handler_data;
u64 req_buf_size;
-
- bool read_takes_no_args;
+ unsigned long flags;
};
@@ -367,7 +370,7 @@ static acpi_status __query_block(struct wmi_block *wblock, u8 instance,
wq_params[0].type = ACPI_TYPE_INTEGER;
wq_params[0].integer.value = instance;
- if (instance == 0 && wblock->read_takes_no_args)
+ if (instance == 0 && test_bit(WMI_READ_TAKES_NO_ARGS, &wblock->flags))
input.count = 0;
/*
@@ -1113,7 +1116,7 @@ static int wmi_create_device(struct device *wmi_bus_dev,
* laptops, WQxx may not be a method at all.)
*/
if (info->type != ACPI_TYPE_METHOD || info->param_count == 0)
- wblock->read_takes_no_args = true;
+ set_bit(WMI_READ_TAKES_NO_ARGS, &wblock->flags);
kfree(info);
--
2.33.1
