linux-kernel - [PATCH V3 1/5] rtc: tegra: protect suspend/resume callbacks with CONFIG_PM

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Date:	Tue, 12 Mar 2013 00:59:57 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	<akpm@...ux-foundation.org>, <a.zummo@...ertech.it>
CC:	<swarren@...dotorg.org>, <rtc-linux@...glegroups.com>,
	<linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<thierry.reding@...onic-design.de>,
	Laxman Dewangan <ldewangan@...dia.com>
Subject: [PATCH V3 1/5] rtc: 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>
Reviewed-by: Thierry Reding <thierry.reding@...onic-design.de>
Reviewed-by: Stephen Warren <swarren@...dia.com>
---
Changes from V1:
- Add Thierry's reviewed by.
- No Change in code.

Changes from V2:
- Add Stephen's reviewed by.
- No Change in code.

 drivers/rtc/rtc-tegra.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/rtc/rtc-tegra.c b/drivers/rtc/rtc-tegra.c
index 0020bab..d64cde6 100644
--- a/drivers/rtc/rtc-tegra.c
+++ b/drivers/rtc/rtc-tegra.c
@@ -390,7 +390,7 @@ static int __exit tegra_rtc_remove(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int tegra_rtc_suspend(struct platform_device *pdev, pm_message_t state)
 {
 	struct device *dev = &pdev->dev;
@@ -446,7 +446,7 @@ static struct platform_driver tegra_rtc_driver = {
 		.owner	= THIS_MODULE,
 		.of_match_table = tegra_rtc_dt_match,
 	},
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 	.suspend	= tegra_rtc_suspend,
 	.resume		= tegra_rtc_resume,
 #endif
-- 
1.7.1.1

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