[PATCH 6.12.y 1/2] media: usbtv: drop redundant device reference

[Sasha Levin <sashal@kernel.org>]

From: Johan Hovold <johan@kernel.org>

[ Upstream commit dbc6798b80481a20f9aff671bc4d529eae63c9e8 ]

Driver core holds a reference to the USB interface and its parent USB
device while the interface is bound to a driver and there is no need to
take additional references unless the structures are needed after
disconnect.

Drop the redundant device reference to reduce cargo culting, make it
easier to spot drivers where an extra reference is needed, and reduce
the risk of memory leaks when drivers fail to release it.

Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
Stable-dep-of: cb705f75d03e ("media: usbtv: fix null-pointer dereference on disconnect")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/media/usb/usbtv/usbtv-core.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/media/usb/usbtv/usbtv-core.c b/drivers/media/usb/usbtv/usbtv-core.c
index 1f7620cd2996d..4925113af9603 100644
--- a/drivers/media/usb/usbtv/usbtv-core.c
+++ b/drivers/media/usb/usbtv/usbtv-core.c
@@ -91,7 +91,7 @@ static int usbtv_probe(struct usb_interface *intf,
 	if (usbtv == NULL)
 		return -ENOMEM;
 	usbtv->dev = dev;
-	usbtv->udev = usb_get_dev(interface_to_usbdev(intf));
+	usbtv->udev = interface_to_usbdev(intf);
 
 	usbtv->iso_size = size;
 
@@ -119,7 +119,6 @@ static int usbtv_probe(struct usb_interface *intf,
 
 usbtv_video_fail:
 	usb_set_intfdata(intf, NULL);
-	usb_put_dev(usbtv->udev);
 	kfree(usbtv);
 
 	return ret;
@@ -137,7 +136,6 @@ static void usbtv_disconnect(struct usb_interface *intf)
 	usbtv_audio_free(usbtv);
 	usbtv_video_free(usbtv);
 
-	usb_put_dev(usbtv->udev);
 	usbtv->udev = NULL;
 
 	/* the usbtv structure will be deallocated when v4l2 will be
-- 
2.53.0