The return value should be checked for non-zero, instead
of checking it being IS_ERR_VALUE().
Acked-by: NAlan Tull <atull@opensource.altera.com>
Reviewed-by: NJosh Cartwright <joshc@eso.teric.us>
Signed-off-by: NMoritz Fischer <moritz.fischer@ettus.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>