linux-kernel - [PATCH 2/3] power/ab8500_btemp: harden platform data check

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Date:	Fri, 13 Apr 2012 10:16:06 +0200
From:	Linus Walleij <linus.walleij@...ricsson.com>
To:	Anton Vorontsov <anton.vorontsov@...aro.org>,
	<linux-kernel@...r.kernel.org>
Cc:	Karl Komierowski <karl.komierowski@...ricsson.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Arun Murthy <arun.murthy@...ricsson.com>
Subject: [PATCH 2/3] power/ab8500_btemp: harden platform data check

From: Linus Walleij <linus.walleij@...aro.org>

If no platform data at all is supplied the driver crashes,
extend the checks to be more careful so we can compile in the
driver and boot also without platform data present.

Cc: Arun Murthy <arun.murthy@...ricsson.com>
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
---
 drivers/power/ab8500_btemp.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/power/ab8500_btemp.c b/drivers/power/ab8500_btemp.c
index d8bb993..e266f03 100644
--- a/drivers/power/ab8500_btemp.c
+++ b/drivers/power/ab8500_btemp.c
@@ -978,12 +978,12 @@ static int __devinit ab8500_btemp_probe(struct platform_device *pdev)
 
 	/* get btemp specific platform data */
 	plat_data = pdev->dev.platform_data;
-	di->pdata = plat_data->btemp;
-	if (!di->pdata) {
+	if (!plat_data || !plat_data->btemp) {
 		dev_err(di->dev, "no btemp platform data supplied\n");
 		ret = -EINVAL;
 		goto free_device_info;
 	}
+	di->pdata = plat_data->btemp;
 
 	/* get battery specific platform data */
 	di->bat = plat_data->battery;
-- 
1.7.9.2

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