target/linux/mvebu/patches-3.10/0107-mtd-nand-pxa3xx-Set-info-use_dma-properly.patch

   1 From c16f0b44984bc623621d26df22823b50f13f65d8 Mon Sep 17 00:00:00 2001
   2 From: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
   3 Date: Tue, 14 May 2013 08:15:21 -0300
   4 Subject: [PATCH 107/203] mtd: nand: pxa3xx: Set info->use_dma properly
   5
   6 Currently, the variable info->use_dma is never set and always
   7 zero-valued which means the driver never does DMA transfers.
   8 We fix this by simply setting info->use_dma to the module parameter,
   9 also named 'use_dma'. Note that the module parameter has the same name,
  10 but different semantics.
  11
  12 This fixes a regression introduced by the below commit
  13 which removed the info->use_dma variable set.
  14
  15   commit 4eb2da8994042d68e84e31138788429a102da2ea
  16   Author: Lei Wen <leiwen@marvell.com>
  17   Date:   Mon Feb 28 10:32:13 2011 +0800
  18
  19       mtd: pxa3xx_nand: unify prepare command
  20
  21 Before the above commit, the driver had use_dma=1 on all NAND commands
  22 except on CMD_STATUS. This behavior is long lost and we are not
  23 recovering in this patch, either.
  24
  25 This was spotted and verified by human inspection.
  26
  27 Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
  28 Tested-by: Nikita Kiryanov <nikita@compulab.co.il>
  29 Acked-by: Igor Grinberg <grinberg@compulab.co.il>
  30 Reviewed-by: Haojian Zhuang <haojian.zhuang@gmail.com>
  31 Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
  32 Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
  33 ---
  34  drivers/mtd/nand/pxa3xx_nand.c | 1 +
  35  1 file changed, 1 insertion(+)
  36
  37 --- a/drivers/mtd/nand/pxa3xx_nand.c
  38 +++ b/drivers/mtd/nand/pxa3xx_nand.c
  39 @@ -506,6 +506,7 @@ static int prepare_command_pool(struct p
  40         info->buf_count         = 0;
  41         info->oob_size          = 0;
  42         info->use_ecc           = 0;
  43 +       info->use_dma           = (use_dma) ? 1 : 0;
  44         info->is_ready          = 0;
  45         info->retcode           = ERR_NONE;
  46         if (info->cs != 0)