target/linux/brcm63xx/patches-3.8/009-spi-bcm63xx-check-spi-bits_per_word-in-spi_setup.patch

   1 From 13a364be644ed9b4666d452756556bb98afdcc56 Mon Sep 17 00:00:00 2001
   2 From: Jonas Gorski <jogo@openwrt.org>
   3 Date: Mon, 11 Mar 2013 13:48:27 +0100
   4 Subject: [PATCH 07/12] spi/bcm63xx: check spi bits_per_word in spi_setup
   5
   6 Instead of fixing up the bits_per_word (which the spi subsystem already
   7 does for us), check it for supported values.
   8
   9 Signed-off-by: Jonas Gorski <jogo@openwrt.org>
  10 ---
  11  drivers/spi/spi-bcm63xx.c |    7 +++++--
  12  1 file changed, 5 insertions(+), 2 deletions(-)
  13
  14 --- a/drivers/spi/spi-bcm63xx.c
  15 +++ b/drivers/spi/spi-bcm63xx.c
  16 @@ -151,8 +151,11 @@ static void bcm63xx_spi_setup_transfer(s
  17
  18  static int bcm63xx_spi_setup(struct spi_device *spi)
  19  {
  20 -       if (!spi->bits_per_word)
  21 -               spi->bits_per_word = 8;
  22 +       if (spi->bits_per_word != 8) {
  23 +               dev_err(&spi->dev, "%s, unsupported bits_per_word=%d\n",
  24 +                       __func__, spi->bits_per_word);
  25 +               return -EINVAL;
  26 +       }
  27
  28         return 0;
  29  }