Changes in v1:
- use core locking in the uvc gadget driver
All V4L2 drivers should use .unlocked_ioctl instead of .ioctl. There are
only three drivers left that do not do that: pvrusb2, radio-bcm2048 and
the uvc gadget driver.
The pvrusb2 driver does its own locking as far as I can tell, so it can
just switch to unlocked_ioctl. Ditto for radio-bcm2048.
The uvc gadget driver uses a lock for the queuing ioctls, but not for
g/s_format. Laurent suggested to just use core locking here, so that's
what I did. Compile tested only. In addition querycap didn't set
device_caps, so that was added as well (this will cause a warning
otherwise).
The last patch removes the old .ioctl op completely.
Regards,
Hans
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