linux-kernel - [PATCH] ACPI / platform: drop redundant ACPI

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Date:	Thu, 13 Feb 2014 22:00:43 -0600
From:	Josh Cartwright <joshc@...eaurora.org>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-acpi@...r.kernel.org, Len Brown <lenb@...nel.org>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] ACPI / platform: drop redundant ACPI_HANDLE check

The acpi_dev_pm_attach/_detach functions perform their own checks to
ensure the device has an ACPI companion.  It is not necessary for the
caller to do so.

This mirrors what other busses with ACPI dev PM support do (i2c, spi,
sdio).

Cc: Len Brown <lenb@...nel.org>
Cc: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Signed-off-by: Josh Cartwright <joshc@...eaurora.org>
---
 drivers/base/platform.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index bc78848..e714709 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -481,11 +481,10 @@ static int platform_drv_probe(struct device *_dev)
 	struct platform_device *dev = to_platform_device(_dev);
 	int ret;
 
-	if (ACPI_HANDLE(_dev))
-		acpi_dev_pm_attach(_dev, true);
+	acpi_dev_pm_attach(_dev, true);
 
 	ret = drv->probe(dev);
-	if (ret && ACPI_HANDLE(_dev))
+	if (ret)
 		acpi_dev_pm_detach(_dev, true);
 
 	if (drv->prevent_deferred_probe && ret == -EPROBE_DEFER) {
@@ -508,8 +507,7 @@ static int platform_drv_remove(struct device *_dev)
 	int ret;
 
 	ret = drv->remove(dev);
-	if (ACPI_HANDLE(_dev))
-		acpi_dev_pm_detach(_dev, true);
+	acpi_dev_pm_detach(_dev, true);
 
 	return ret;
 }
@@ -520,8 +518,7 @@ static void platform_drv_shutdown(struct device *_dev)
 	struct platform_device *dev = to_platform_device(_dev);
 
 	drv->shutdown(dev);
-	if (ACPI_HANDLE(_dev))
-		acpi_dev_pm_detach(_dev, true);
+	acpi_dev_pm_detach(_dev, true);
 }
 
 /**
-- 
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