mfd: 88pm800: Fix potential NULL pdata dereference

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

Signed-off-by: Chao Xie <chao.xie@marvell.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

diff --git a/drivers/mfd/88pm800.c b/drivers/mfd/88pm800.c
index cd9e174..a65447d 100644 (file)
--- 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;