ACPI: LPSS: Use ACPI_COMPANION() directly
The ACPI_HANDLE() macro returns the ACPI handle of the ACPI device
object returned by the ACPI_COMPANION() macro, so it is more
straightforward to call the latter directly instead of passing
the handle produced by the former to acpi_bus_get_device().
Modify the code accordingly (no intentional functional impact).
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
index 30b1f51..5ecd3a3 100644
--- a/drivers/acpi/acpi_lpss.c
+++ b/drivers/acpi/acpi_lpss.c
@@ -712,14 +712,13 @@
static int lpss_reg_read(struct device *dev, unsigned int reg, u32 *val)
{
- struct acpi_device *adev;
+ struct acpi_device *adev = ACPI_COMPANION(dev);
struct lpss_private_data *pdata;
unsigned long flags;
int ret;
- ret = acpi_bus_get_device(ACPI_HANDLE(dev), &adev);
- if (WARN_ON(ret))
- return ret;
+ if (WARN_ON(!adev))
+ return -ENODEV;
spin_lock_irqsave(&dev->power.lock, flags);
if (pm_runtime_suspended(dev)) {
@@ -732,6 +731,7 @@
goto out;
}
*val = __lpss_reg_read(pdata, reg);
+ ret = 0;
out:
spin_unlock_irqrestore(&dev->power.lock, flags);
@@ -1266,7 +1266,8 @@
if (!id || !id->driver_data)
return 0;
- if (acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev))
+ adev = ACPI_COMPANION(&pdev->dev);
+ if (!adev)
return 0;
pdata = acpi_driver_data(adev);
