[media] cx231xx: fix sparse warnings

drivers/media/usb/cx231xx/cx231xx-avcore.c:2226:15: warning: cast to restricted __le32
drivers/media/usb/cx231xx/cx231xx-avcore.c:2447:15: warning: cast to restricted __le32
drivers/media/usb/cx231xx/cx231xx-avcore.c:2475:15: warning: cast to restricted __le32
drivers/media/usb/cx231xx/cx231xx-avcore.c:2500:15: warning: cast to restricted __le32
drivers/media/usb/cx231xx/cx231xx-avcore.c:2647:18: warning: incorrect type in assignment (different base types)
drivers/media/usb/cx231xx/cx231xx-avcore.c:2659:21: warning: cast to restricted __le32
drivers/media/usb/cx231xx/cx231xx-dvb.c:743:57: warning: Using plain integer as NULL pointer
drivers/media/usb/cx231xx/cx231xx-dvb.c:776:57: warning: Using plain integer as NULL pointer

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/usb/cx231xx/cx231xx-avcore.c

@@ -2223,7 +2223,7 @@ int cx231xx_set_power_mode(struct cx231xx *dev, enum AV_MODE mode)
 	if (status < 0)
 		return status;
 
-	tmp = le32_to_cpu(*((u32 *) value));
+	tmp = le32_to_cpu(*((__le32 *) value));
 
 	switch (mode) {
 	case POLARIS_AVMODE_ENXTERNAL_AV:
@@ -2444,7 +2444,7 @@ int cx231xx_power_suspend(struct cx231xx *dev)
 	if (status > 0)
 		return status;
 
-	tmp = le32_to_cpu(*((u32 *) value));
+	tmp = le32_to_cpu(*((__le32 *) value));
 	tmp &= (~PWR_MODE_MASK);
 
 	value[0] = (u8) tmp;
@@ -2472,7 +2472,7 @@ int cx231xx_start_stream(struct cx231xx *dev, u32 ep_mask)
 	if (status < 0)
 		return status;
 
-	tmp = le32_to_cpu(*((u32 *) value));
+	tmp = le32_to_cpu(*((__le32 *) value));
 	tmp |= ep_mask;
 	value[0] = (u8) tmp;
 	value[1] = (u8) (tmp >> 8);
@@ -2497,7 +2497,7 @@ int cx231xx_stop_stream(struct cx231xx *dev, u32 ep_mask)
 	if (status < 0)
 		return status;
 
-	tmp = le32_to_cpu(*((u32 *) value));
+	tmp = le32_to_cpu(*((__le32 *) value));
 	tmp &= (~ep_mask);
 	value[0] = (u8) tmp;
 	value[1] = (u8) (tmp >> 8);
@@ -2644,7 +2644,7 @@ static int cx231xx_set_gpio_bit(struct cx231xx *dev, u32 gpio_bit, u32 gpio_val)
 {
 	int status = 0;
 
-	gpio_val = cpu_to_le32(gpio_val);
+	gpio_val = (__force u32)cpu_to_le32(gpio_val);
 	status = cx231xx_send_gpio_cmd(dev, gpio_bit, (u8 *)&gpio_val, 4, 0, 0);
 
 	return status;
@@ -2652,7 +2652,7 @@ static int cx231xx_set_gpio_bit(struct cx231xx *dev, u32 gpio_bit, u32 gpio_val)
 
 static int cx231xx_get_gpio_bit(struct cx231xx *dev, u32 gpio_bit, u32 *gpio_val)
 {
-	u32 tmp;
+	__le32 tmp;
 	int status = 0;
 
 	status = cx231xx_send_gpio_cmd(dev, gpio_bit, (u8 *)&tmp, 4, 0, 1);

drivers/media/usb/cx231xx/cx231xx-core.c

@@ -1491,7 +1491,7 @@ int cx231xx_mode_register(struct cx231xx *dev, u16 address, u32 mode)
 	if (status < 0)
 		return status;
 
-	tmp = le32_to_cpu(*((u32 *) value));
+	tmp = le32_to_cpu(*((__le32 *) value));
 	tmp |= mode;
 
 	value[0] = (u8) tmp;

drivers/media/usb/cx231xx/cx231xx-dvb.c

@@ -740,7 +740,7 @@ static int dvb_init(struct cx231xx *dev)
 			goto out_free;
 		}
 
-		dev->dvb->frontend->ops.i2c_gate_ctrl = 0;
+		dev->dvb->frontend->ops.i2c_gate_ctrl = NULL;
 
 		/* define general-purpose callback pointer */
 		dvb->frontend->callback = cx231xx_tuner_callback;
@@ -773,7 +773,7 @@ static int dvb_init(struct cx231xx *dev)
 			goto out_free;
 		}
 
-		dev->dvb->frontend->ops.i2c_gate_ctrl = 0;
+		dev->dvb->frontend->ops.i2c_gate_ctrl = NULL;
 
 		/* define general-purpose callback pointer */
 		dvb->frontend->callback = cx231xx_tuner_callback;