[media] adv7180: free an interrupt on failure paths in init_device()

There is request_irq() in init_device(), but the interrupt is not removed
on failure paths. The patch adds proper error handling.

Found by Linux Driver Verification project (linuxtesting.org).

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

1 files changed, 11 insertions, 7 deletions

diff --git a/drivers/media/i2c/adv7180.c b/drivers/media/i2c/adv7180.c
index 9cfc9a3ab3cc..5e638b159452 100644
--- a/drivers/media/i2c/adv7180.c
+++ b/drivers/media/i2c/adv7180.c
@@ -561,40 +561,44 @@ static int init_device(struct i2c_client *client, struct adv7180_state *state)
                 ret = i2c_smbus_write_byte_data(client, ADV7180_ADI_CTRL_REG,
                                                 ADV7180_ADI_CTRL_IRQ_SPACE);
                 if (ret < 0)
-                        return ret;
+                        goto err;
 
                 /* config the Interrupt pin to be active low */
                 ret = i2c_smbus_write_byte_data(client, ADV7180_ICONF1_ADI,
                                                 ADV7180_ICONF1_ACTIVE_LOW |
                                                 ADV7180_ICONF1_PSYNC_ONLY);
                 if (ret < 0)
-                        return ret;
+                        goto err;
 
                 ret = i2c_smbus_write_byte_data(client, ADV7180_IMR1_ADI, 0);
                 if (ret < 0)
-                        return ret;
+                        goto err;
 
                 ret = i2c_smbus_write_byte_data(client, ADV7180_IMR2_ADI, 0);
                 if (ret < 0)
-                        return ret;
+                        goto err;
 
                 /* enable AD change interrupts interrupts */
                 ret = i2c_smbus_write_byte_data(client, ADV7180_IMR3_ADI,
                                                 ADV7180_IRQ3_AD_CHANGE);
                 if (ret < 0)
-                        return ret;
+                        goto err;
 
                 ret = i2c_smbus_write_byte_data(client, ADV7180_IMR4_ADI, 0);
                 if (ret < 0)
-                        return ret;
+                        goto err;
 
                 ret = i2c_smbus_write_byte_data(client, ADV7180_ADI_CTRL_REG,
                                                 0);
                 if (ret < 0)
-                        return ret;
+                        goto err;
         }
 
         return 0;
+
+err:
+        free_irq(state->irq, state);
+        return ret;
 }
 
 static int adv7180_probe(struct i2c_client *client,