V4L/DVB (6465): Use correct error codes when chip is not recognized

If the chip isn't recognized, then the correct errors should be returned.
The v4l2_i2c_attach() utility function will return 0 for all errors
except -ENOMEM to provide proper compatibility support for the old I2C
probing function.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/cs53l32a.c

@@ -140,7 +140,7 @@ static int cs53l32a_probe(struct i2c_client *client)
 
 	/* Check if the adapter supports the needed features */
 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
-		return 0;
+		return -EIO;
 
 	snprintf(client->name, sizeof(client->name) - 1, "cs53l32a");
 

drivers/media/video/cx25840/cx25840-core.c

@@ -1078,6 +1078,10 @@ static int cx25840_probe(struct i2c_client *client)
 	u32 id;
 	u16 device_id;
 
+	/* Check if the adapter supports the needed features */
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+		return -EIO;
+
 	v4l_dbg(1, cx25840_debug, client, "detecting cx25840 client on address 0x%x\n", client->addr << 1);
 
 	device_id = cx25840_read(client, 0x101) << 8;
@@ -1093,7 +1097,7 @@ static int cx25840_probe(struct i2c_client *client)
 	}
 	else {
 		v4l_dbg(1, cx25840_debug, client, "cx25840 not found\n");
-		return 0;
+		return -ENODEV;
 	}
 
 	state = kzalloc(sizeof(struct cx25840_state), GFP_KERNEL);

drivers/media/video/msp3400-driver.c

@@ -812,7 +812,7 @@ static int msp_probe(struct i2c_client *client)
 
 	if (msp_reset(client) == -1) {
 		v4l_dbg(1, msp_debug, client, "msp3400 not found\n");
-		return 0;
+		return -ENODEV;
 	}
 
 	state = kzalloc(sizeof(*state), GFP_KERNEL);
@@ -844,7 +844,7 @@ static int msp_probe(struct i2c_client *client)
 	if (state->rev1 == -1 || (state->rev1 == 0 && state->rev2 == 0)) {
 		v4l_dbg(1, msp_debug, client, "not an msp3400 (cannot read chip version)\n");
 		kfree(state);
-		return 0;
+		return -ENODEV;
 	}
 
 	msp_set_audio(client);

drivers/media/video/saa7115.c

@@ -1459,7 +1459,7 @@ static int saa7115_probe(struct i2c_client *client)
 
 	/* Check if the adapter supports the needed features */
 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
-		return 0;
+		return -EIO;
 
 	snprintf(client->name, sizeof(client->name) - 1, "saa7115");
 
@@ -1478,7 +1478,7 @@ static int saa7115_probe(struct i2c_client *client)
 	if (memcmp(name, "1f711", 5)) {
 		v4l_dbg(1, debug, client, "chip found @ 0x%x (ID %s) does not match a known saa711x chip.\n",
 			client->addr << 1, name);
-		return 0;
+		return -ENODEV;
 	}
 
 	snprintf(client->name, sizeof(client->name) - 1, "saa711%d",chip_id);

drivers/media/video/saa7127.c

@@ -671,7 +671,7 @@ static int saa7127_probe(struct i2c_client *client)
 
 	/* Check if the adapter supports the needed features */
 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
-		return 0;
+		return -EIO;
 
 	snprintf(client->name, sizeof(client->name) - 1, "saa7127");
 
@@ -685,12 +685,12 @@ static int saa7127_probe(struct i2c_client *client)
 	if ((saa7127_read(client, 0) & 0xe4) != 0 ||
 			(saa7127_read(client, 0x29) & 0x3f) != 0x1d) {
 		v4l_dbg(1, debug, client, "saa7127 not found\n");
-		return 0;
+		return -ENODEV;
 	}
 	state = kzalloc(sizeof(struct saa7127_state), GFP_KERNEL);
 
 	if (state == NULL) {
-		return (-ENOMEM);
+		return -ENOMEM;
 	}
 
 	i2c_set_clientdata(client, state);

drivers/media/video/tlv320aic23b.c

@@ -133,7 +133,7 @@ static int tlv320aic23b_probe(struct i2c_client *client)
 
 	/* Check if the adapter supports the needed features */
 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
-		return 0;
+		return -EIO;
 
 	v4l_info(client, "chip found @ 0x%x (%s)\n", client->addr << 1, client->adapter->name);
 

drivers/media/video/upd64031a.c

@@ -200,7 +200,7 @@ static int upd64031a_probe(struct i2c_client *client)
 	int i;
 
 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
-		return 0;
+		return -EIO;
 
 	v4l_info(client, "chip found @ 0x%x (%s)\n", client->addr << 1, client->adapter->name);
 

drivers/media/video/upd64083.c

@@ -178,7 +178,7 @@ static int upd64083_probe(struct i2c_client *client)
 	int i;
 
 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
-		return 0;
+		return -EIO;
 
 	v4l_info(client, "chip found @ 0x%x (%s)\n", client->addr << 1, client->adapter->name);
 

drivers/media/video/v4l2-common.c

@@ -1037,7 +1037,7 @@ int v4l2_i2c_attach(struct i2c_adapter *adapter, int address, struct i2c_driver
 	else {
 		kfree(client);
 	}
-	return err;
+	return err != -ENOMEM ? 0 : err;
 }
 
 /* ----------------------------------------------------------------- */

drivers/media/video/vp27smpx.c

@@ -131,7 +131,7 @@ static int vp27smpx_probe(struct i2c_client *client)
 
 	/* Check if the adapter supports the needed features */
 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
-		return 0;
+		return -EIO;
 
 	snprintf(client->name, sizeof(client->name) - 1, "vp27smpx");
 

drivers/media/video/wm8739.c

@@ -264,6 +264,10 @@ static int wm8739_probe(struct i2c_client *client)
 {
 	struct wm8739_state *state;
 
+	/* Check if the adapter supports the needed features */
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+		return -EIO;
+
 	v4l_info(client, "chip found @ 0x%x (%s)\n", client->addr << 1, client->adapter->name);
 
 	state = kmalloc(sizeof(struct wm8739_state), GFP_KERNEL);