spi: allow registering empty spi_board_info lists

Many boards form list of spi_board_info entries depending on config,
and it is possible to end up with empty list. Do not report error
in such cases.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 6cc86060d22f005400bb5dcfb4bb4b91d4952596..f699ea530b88e6c0bbd24450185a3e140a76a15e 100644 (file)
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -690,7 +690,7 @@ int spi_register_board_info(struct spi_board_info const *info, unsigned n)
        int i;
 
        if (!n)
-               return -EINVAL;
+               return 0;
 
        bi = kcalloc(n, sizeof(*bi), GFP_KERNEL);
        if (!bi)