hwmon: (lis3lv02d) Prevent NULL pointer dereference

If CONFIG_PM was selected and lis3lv02d_platform_data was NULL,
the kernel will be panic when halt command run.

Reported-by: Yusuke Goda <yusuke.goda.sx@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Samu Onkalo <samu.p.onkalo@nokia.com>
Sigend-off-by: Jean Delvare <khali@linux-fr.org>

diff --git a/drivers/hwmon/lis3lv02d_i2c.c b/drivers/hwmon/lis3lv02d_i2c.c
index dc1f540..8e5933b 100644 (file)
--- a/drivers/hwmon/lis3lv02d_i2c.c
+++ b/drivers/hwmon/lis3lv02d_i2c.c
@@ -121,7 +121,7 @@ static int lis3lv02d_i2c_suspend(struct i2c_client *client, pm_message_t mesg)
 {
        struct lis3lv02d *lis3 = i2c_get_clientdata(client);
 
-       if (!lis3->pdata->wakeup_flags)
+       if (!lis3->pdata || !lis3->pdata->wakeup_flags)
                lis3lv02d_poweroff(lis3);
        return 0;
 }
@@ -130,7 +130,7 @@ static int lis3lv02d_i2c_resume(struct i2c_client *client)
 {
        struct lis3lv02d *lis3 = i2c_get_clientdata(client);
 
-       if (!lis3->pdata->wakeup_flags)
+       if (!lis3->pdata || !lis3->pdata->wakeup_flags)
                lis3lv02d_poweron(lis3);
        return 0;
 }

diff --git a/drivers/hwmon/lis3lv02d_spi.c b/drivers/hwmon/lis3lv02d_spi.c
index 82b1680..b9be5e3 100644 (file)
--- a/drivers/hwmon/lis3lv02d_spi.c
+++ b/drivers/hwmon/lis3lv02d_spi.c
@@ -92,7 +92,7 @@ static int lis3lv02d_spi_suspend(struct spi_device *spi, pm_message_t mesg)
 {
        struct lis3lv02d *lis3 = spi_get_drvdata(spi);
 
-       if (!lis3->pdata->wakeup_flags)
+       if (!lis3->pdata || !lis3->pdata->wakeup_flags)
                lis3lv02d_poweroff(&lis3_dev);
 
        return 0;
@@ -102,7 +102,7 @@ static int lis3lv02d_spi_resume(struct spi_device *spi)
 {
        struct lis3lv02d *lis3 = spi_get_drvdata(spi);
 
-       if (!lis3->pdata->wakeup_flags)
+       if (!lis3->pdata || !lis3->pdata->wakeup_flags)
                lis3lv02d_poweron(lis3);
 
        return 0;