releases/3.16.7/spi-dw-mid-respect-8-bit-mode.patch

   1 From b41583e7299046abdc578c33f25ed83ee95b9b31 Mon Sep 17 00:00:00 2001
   2 From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
   3 Date: Thu, 18 Sep 2014 20:08:51 +0300
   4 Subject: spi: dw-mid: respect 8 bit mode
   5
   6 From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
   7
   8 commit b41583e7299046abdc578c33f25ed83ee95b9b31 upstream.
   9
  10 In case of 8 bit mode and DMA usage we end up with every second byte written as
  11 0. We have to respect bits_per_word settings what this patch actually does.
  12
  13 Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
  14 Signed-off-by: Mark Brown <broonie@kernel.org>
  15 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  16
  17 ---
  18  drivers/spi/spi-dw-mid.c |    4 ++--
  19  1 file changed, 2 insertions(+), 2 deletions(-)
  20
  21 --- a/drivers/spi/spi-dw-mid.c
  22 +++ b/drivers/spi/spi-dw-mid.c
  23 @@ -136,7 +136,7 @@ static int mid_spi_dma_transfer(struct d
  24         txconf.dst_addr = dws->dma_addr;
  25         txconf.dst_maxburst = LNW_DMA_MSIZE_16;
  26         txconf.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
  27 -       txconf.dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
  28 +       txconf.dst_addr_width = dws->dma_width;
  29         txconf.device_fc = false;
  30
  31         txchan->device->device_control(txchan, DMA_SLAVE_CONFIG,
  32 @@ -159,7 +159,7 @@ static int mid_spi_dma_transfer(struct d
  33         rxconf.src_addr = dws->dma_addr;
  34         rxconf.src_maxburst = LNW_DMA_MSIZE_16;
  35         rxconf.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
  36 -       rxconf.src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
  37 +       rxconf.src_addr_width = dws->dma_width;
  38         rxconf.device_fc = false;
  39
  40         rxchan->device->device_control(rxchan, DMA_SLAVE_CONFIG,