linux-kernel - [PATCH 2/3] spi: allocate spi_board

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Date:   Mon, 27 Feb 2017 20:08:47 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Mark Brown <broonie@...nel.org>
Cc:     linux-spi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] spi: allocate spi_board_info entries one by one

Lists of spi_board_info entries registered with spi_register_board_info()
can be quite long; instead of forcing memory allocator find contagious
chunk of memory, let;s allocate them one-by-one, so they can be packed as
needed.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
 drivers/spi/spi.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index b948d8cdbace..029864410a5f 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -686,14 +686,13 @@ int spi_register_board_info(struct spi_board_info const *info, unsigned n)
 	if (!n)
 		return -EINVAL;
 
-	bi = kzalloc(n * sizeof(*bi), GFP_KERNEL);
-	if (!bi)
-		return -ENOMEM;
-
-	for (i = 0; i < n; i++, bi++, info++) {
+	for (i = 0; i < n; i++, info++) {
 		struct spi_master *master;
 
-		memcpy(&bi->board_info, info, sizeof(*info));
+		bi = kmemdup(info, sizeof(*bi), GFP_KERNEL);
+		if (!bi)
+			return -ENOMEM;
+
 		bi->board_info.properties =
 			property_entries_dup(info->properties);
 		if (IS_ERR(bi->board_info.properties))
-- 
2.11.0.483.g087da7b7c-goog