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Subject[PATCH v1 1/1] platform/surface: Switch to use acpi_evaluate_dsm_typed()
Date
The acpi_evaluate_dsm_typed() provides a way to check the type of the
object evaluated by _DSM call. Use it instead of open coded variant.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
drivers/platform/surface/surface_hotplug.c | 13 +++----------
1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/drivers/platform/surface/surface_hotplug.c b/drivers/platform/surface/surface_hotplug.c
index f004a2495201..7b6d887dccdb 100644
--- a/drivers/platform/surface/surface_hotplug.c
+++ b/drivers/platform/surface/surface_hotplug.c
@@ -101,18 +101,12 @@ static void shps_dsm_notify_irq(struct platform_device *pdev, enum shps_irq_type
param.type = ACPI_TYPE_INTEGER;
param.integer.value = value;

- result = acpi_evaluate_dsm(handle, &shps_dsm_guid, SHPS_DSM_REVISION,
- shps_dsm_fn_for_irq(type), &param);
-
+ result = acpi_evaluate_dsm_typed(handle, &shps_dsm_guid, SHPS_DSM_REVISION,
+ shps_dsm_fn_for_irq(type), &param, ACPI_TYPE_BUFFER);
if (!result) {
dev_err(&pdev->dev, "IRQ notification via DSM failed (irq=%d, gpio=%d)\n",
type, value);

- } else if (result->type != ACPI_TYPE_BUFFER) {
- dev_err(&pdev->dev,
- "IRQ notification via DSM failed: unexpected result type (irq=%d, gpio=%d)\n",
- type, value);
-
} else if (result->buffer.length != 1 || result->buffer.pointer[0] != 0) {
dev_err(&pdev->dev,
"IRQ notification via DSM failed: unexpected result value (irq=%d, gpio=%d)\n",
@@ -121,8 +115,7 @@ static void shps_dsm_notify_irq(struct platform_device *pdev, enum shps_irq_type

mutex_unlock(&sdev->lock[type]);

- if (result)
- ACPI_FREE(result);
+ ACPI_FREE(result);
}

static irqreturn_t shps_handle_irq(int irq, void *data)
--
2.39.0
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