From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Date: Tue, 28 Feb 2017 22:25:19 +0000 (-0800)
Subject: spi: allow registering empty spi_board_info lists
X-Git-Tag: v4.12-rc1~110^2~3^2
X-Git-Url: http://git.samba.org/samba.git/?p=sfrench%2Fcifs-2.6.git;a=commitdiff_plain;h=f974cf57b1b95839b224b01335c45347f746a365

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 6cc86060d22f..f699ea530b88 100644
--- 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)