diff options
| author | Srinivas Pandruvada | 2022-02-11 08:09:29 -0800 |
|---|---|---|
| committer | Rafael J. Wysocki | 2022-02-25 20:49:29 +0100 |
| commit | d445571fa369cf08148dcd9bce563d5fae14fcd7 (patch) | |
| tree | 7e2a5c28c83ea07941285b0eb275fdd91529a09a /drivers/acpi | |
| parent | 00ae053a0533155d830da27070a931e6fa747327 (diff) | |
ACPI: fan: Optimize struct acpi_fan_fif
We don't need u64 to store the information about _FIF. There are two
booleans (fine_grain_ctrl and low_speed_notification) and one field
step_size which can take value from 1-9. There are no internal users
of revision field. So convert all fields to u8, by not directly
extracting the _FIF info the struct. Use an intermediate buffer to
extract and assign.
This will help to do u32 math using these fields. No functional
changes are expected.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/fan.h | 8 | ||||
| -rw-r--r-- | drivers/acpi/fan_core.c | 8 |
2 files changed, 11 insertions, 5 deletions
diff --git a/drivers/acpi/fan.h b/drivers/acpi/fan.h index 36c5e1a57094..6cbb4b028da0 100644 --- a/drivers/acpi/fan.h +++ b/drivers/acpi/fan.h @@ -30,10 +30,10 @@ struct acpi_fan_fps { }; struct acpi_fan_fif { - u64 revision; - u64 fine_grain_ctrl; - u64 step_size; - u64 low_speed_notification; + u8 revision; + u8 fine_grain_ctrl; + u8 step_size; + u8 low_speed_notification; }; struct acpi_fan { diff --git a/drivers/acpi/fan_core.c b/drivers/acpi/fan_core.c index 9f8e68403fad..484cee0fb13e 100644 --- a/drivers/acpi/fan_core.c +++ b/drivers/acpi/fan_core.c @@ -211,7 +211,8 @@ static int acpi_fan_get_fif(struct acpi_device *device) struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; struct acpi_fan *fan = acpi_driver_data(device); struct acpi_buffer format = { sizeof("NNNN"), "NNNN" }; - struct acpi_buffer fif = { sizeof(fan->fif), &fan->fif }; + u64 fields[4]; + struct acpi_buffer fif = { sizeof(fields), fields }; union acpi_object *obj; acpi_status status; @@ -232,6 +233,11 @@ static int acpi_fan_get_fif(struct acpi_device *device) status = -EINVAL; } + fan->fif.revision = fields[0]; + fan->fif.fine_grain_ctrl = fields[1]; + fan->fif.step_size = fields[2]; + fan->fif.low_speed_notification = fields[3]; + err: kfree(obj); return status; |