From: Asaf Penso <as...@nvidia.com>
> There are several functions implementation that queries the drv type to
> understand which fops function to use.
> In case the type is DV, the function gets the concrete DV function and calls
> it.
> In case it’s not, the function returns an error.
>
> The current implementation is not flexible enough and will not support future
> concrete functions in a good way.
>
> This patch adds more stub functions that include error handling and are
> assigned
> to the null drv ops struct.
> This allows the functions to always call the virtual function without basing
> the
> decision on a specific drv type.
>
> Signed-off-by: Asaf Penso <as...@nvidia.com>
Acked-by: Matan Azrad <ma...@nvidia.com>
