linux-kernel - [PATCH 1/4] mfd: 88pm800: Fix the bug that pdata may be NULL

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Message-ID: <1375086567-10705-2-git-send-email-chao.xie@marvell.com>
Date:	Mon, 29 Jul 2013 04:29:24 -0400
From:	Chao Xie <chao.xie@...vell.com>
To:	<linux-kernel@...r.kernel.org>, <sameo@...ux.intel.com>,
	<xiechao.mail@...il.com>
CC:	Chao Xie <chao.xie@...vell.com>
Subject: [PATCH 1/4] mfd: 88pm800: Fix the bug that pdata may be NULL

User pass platform data to device, and platform data may be
NULL. Add the check for pdata.

Signed-off-by: Chao Xie <chao.xie@...vell.com>
---
 drivers/mfd/88pm800.c |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/mfd/88pm800.c b/drivers/mfd/88pm800.c
index 6c95483..d4d272f 100644
--- a/drivers/mfd/88pm800.c
+++ b/drivers/mfd/88pm800.c
@@ -333,9 +333,11 @@ static int device_rtc_init(struct pm80x_chip *chip,
 {
 	int ret;
 
-	rtc_devs[0].platform_data = pdata->rtc;
-	rtc_devs[0].pdata_size =
-			pdata->rtc ? sizeof(struct pm80x_rtc_pdata) : 0;
+	if (pdata) {
+		rtc_devs[0].platform_data = pdata->rtc;
+		rtc_devs[0].pdata_size =
+				pdata->rtc ? sizeof(struct pm80x_rtc_pdata) : 0;
+	}
 	ret = mfd_add_devices(chip->dev, 0, &rtc_devs[0],
 			      ARRAY_SIZE(rtc_devs), NULL, 0, NULL);
 	if (ret) {
@@ -578,7 +580,7 @@ static int pm800_probe(struct i2c_client *client,
 		goto err_device_init;
 	}
 
-	if (pdata->plat_config)
+	if (pdata && pdata->plat_config)
 		pdata->plat_config(chip, pdata);
 
 	return 0;
-- 
1.7.4.1

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