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>

1 files changed, 6 insertions, 4 deletions

diff --git a/drivers/mfd/88pm800.c b/drivers/mfd/88pm800.c
index cd9e17471232..a65447d65605 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;