Patchwork [1/5] mtd: nand: pxa3xx: Set info->use_dma properly

mail settings
Submitter Ezequiel Garcia
Date May 14, 2013, 11:15 a.m.
Message ID <>
Download mbox | patch
Permalink /patch/243907/
State Accepted
Commit 0a60d049812e959b43b0556ef5b914d0900b6283
Headers show


Ezequiel Garcia - May 14, 2013, 11:15 a.m.
From: Ezequiel Garcia <>

Currently, the variable info->use_dma is never set and always
zero-valued which means the driver never does DMA transfers.
We fix this by simply setting info->use_dma to the module parameter,
also named 'use_dma'. Note that the module parameter has the same name,
but different semantics.

This fixes a regression introduced by the below commit
which removed the info->use_dma variable set.

  commit 4eb2da8994042d68e84e31138788429a102da2ea
  Author: Lei Wen <>
  Date:   Mon Feb 28 10:32:13 2011 +0800

      mtd: pxa3xx_nand: unify prepare command

Before the above commit, the driver had use_dma=1 on all NAND commands
except on CMD_STATUS. This behavior is long lost and we are not
recovering in this patch, either.

This was spotted and verified only by human inspection. No testing of
any kind has been performed for lack of hardware.

Cc: Lei Wen <>
Signed-off-by: Ezequiel Garcia <>
 drivers/mtd/nand/pxa3xx_nand.c | 1 +
 1 file changed, 1 insertion(+)


diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
index 14d3db5..cef1eeb 100644
--- a/drivers/mtd/nand/pxa3xx_nand.c
+++ b/drivers/mtd/nand/pxa3xx_nand.c
@@ -506,6 +506,7 @@  static int prepare_command_pool(struct pxa3xx_nand_info *info, int command,
 	info->buf_count		= 0;
 	info->oob_size		= 0;
 	info->use_ecc		= 0;
+	info->use_dma		= (use_dma) ? 1 : 0;
 	info->is_ready		= 0;
 	info->retcode		= ERR_NONE;
 	if (info->cs != 0)