The bounded counter can't be reconfigured to be in auto mode, in attempt to do it, the user will get an error, but without any hint why. Update nldev interface to return an error message through extack mechanism. Link: https://lore.kernel.org/r/20201230130240.180737-1-leon@kernel.org Signed-off-by: Patrisious Haddad <phaddad@nvidia.com> Signed-off-by: Leon Romanovsky <leonro@nvidia.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>