linux-kernel - [PATCH 1/5] driver core/platform_device_add_data: set platform

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Message-Id: <1302081865-2962-1-git-send-email-u.kleine-koenig@pengutronix.de>
Date:	Wed,  6 Apr 2011 11:24:21 +0200
From:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
To:	Greg KH <gregkh@...e.de>
Cc:	linux-kernel@...r.kernel.org, kernel@...gutronix.de,
	Viresh Kumar <viresh.kumar@...com>,
	linux-arm-kernel@...ts.infradead.org, shiraz.hashim@...com
Subject: [PATCH 1/5] driver core/platform_device_add_data: set platform_data to NULL if !data

This makes the data = NULL case more consistent to the data != NULL case.
The functional change is that now

	platform_device_add_data(somepdev, NULL, somesize)

sets pdev->dev.platform_data to NULL instead of not touching it.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
---
Hello,

if you think I should squash some of the first four patches together
just tell me.

Best regards
Uwe

 drivers/base/platform.c |   17 ++++++++---------
 1 files changed, 8 insertions(+), 9 deletions(-)

diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index f051cff..f836f2e 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -219,17 +219,16 @@ EXPORT_SYMBOL_GPL(platform_device_add_resources);
 int platform_device_add_data(struct platform_device *pdev, const void *data,
 			     size_t size)
 {
-	void *d;
+	void *d = NULL;
 
-	if (!data)
-		return 0;
-
-	d = kmemdup(data, size, GFP_KERNEL);
-	if (d) {
-		pdev->dev.platform_data = d;
-		return 0;
+	if (data) {
+		d = kmemdup(data, size, GFP_KERNEL);
+		if (!d)
+			return -ENOMEM;
 	}
-	return -ENOMEM;
+
+	pdev->dev.platform_data = d;
+	return 0;
 }
 EXPORT_SYMBOL_GPL(platform_device_add_data);
 
-- 
1.7.2.3

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