Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

1 files changed, 15 insertions, 6 deletions

diff --git a/drivers/media/v4l2-core/v4l2-device.c b/drivers/media/v4l2-core/v4l2-device.c
index 5b0a30b9252b..7129e438f29e 100644
--- a/drivers/media/v4l2-core/v4l2-device.c
+++ b/drivers/media/v4l2-core/v4l2-device.c
@@ -118,11 +118,20 @@ void v4l2_device_unregister(struct v4l2_device *v4l2_dev)
 		if (sd->flags & V4L2_SUBDEV_FL_IS_I2C) {
 			struct i2c_client *client = v4l2_get_subdevdata(sd);
 
-			/* We need to unregister the i2c client explicitly.
-			   We cannot rely on i2c_del_adapter to always
-			   unregister clients for us, since if the i2c bus
-			   is a platform bus, then it is never deleted. */
-			if (client)
+			/*
+			 * We need to unregister the i2c client
+			 * explicitly. We cannot rely on
+			 * i2c_del_adapter to always unregister
+			 * clients for us, since if the i2c bus is a
+			 * platform bus, then it is never deleted.
+			 *
+			 * Device tree or ACPI based devices must not
+			 * be unregistered as they have not been
+			 * registered by us, and would not be
+			 * re-created by just probing the V4L2 driver.
+			 */
+			if (client &&
+			    !client->dev.of_node && !client->dev.fwnode)
 				i2c_unregister_device(client);
 			continue;
 		}
@@ -131,7 +140,7 @@ void v4l2_device_unregister(struct v4l2_device *v4l2_dev)
 		if (sd->flags & V4L2_SUBDEV_FL_IS_SPI) {
 			struct spi_device *spi = v4l2_get_subdevdata(sd);
 
-			if (spi)
+			if (spi && !spi->dev.of_node && !spi->dev.fwnode)
 				spi_unregister_device(spi);
 			continue;
 		}