linux-kernel - [PATCH V2] i2c: tegra: protect suspend/resume callbacks with CONFIG_PM

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Date:	Sat, 18 Aug 2012 17:49:58 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	<khali@...ux-fr.org>, <w.sang@...gutronix.de>, <swarren@...dia.com>
CC:	<linux-i2c@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-tegra@...r.kernel.org>,
	<broonie@...nsource.wolfsonmicro.com>,
	Laxman Dewangan <ldewangan@...dia.com>
Subject: [PATCH V2] i2c: tegra: protect suspend/resume callbacks with CONFIG_PM_SLEEP

The CONFIG_PM doesn't actually enable any of the PM callbacks, it
only allows to enable CONFIG_PM_SLEEP and CONFIG_PM_RUNTIME.
This means if CONFIG_PM is used to protect system sleep callbacks
then it may end up unreferenced if only runtime PM is enabled.
Hence protecting sleep callbacks with CONFIG_PM_SLEEP.

Signed-off-by: Laxman Dewangan <ldewangan@...dia.com>
---
This patch will remove the compilation warning if CONFIG_PM_SLEEP
is not enabled.

Change from V1 ->V2:
provide more details in description as per Mark's response.

 drivers/i2c/busses/i2c-tegra.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index 66eb53f..9a08c57 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -712,7 +712,7 @@ static int __devexit tegra_i2c_remove(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int tegra_i2c_suspend(struct device *dev)
 {
 	struct tegra_i2c_dev *i2c_dev = dev_get_drvdata(dev);
-- 
1.7.1.1

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