[PATCH linux-next 1/1] spi: imx: only allow dynamic burst in PIO mode

[PATCH linux-next 1/1] spi: imx: only allow dynamic burst in PIO mode

[Jiada Wang]

Currently only PIO mode supports dynamic burst length adjust,
in DMA mode, bpw (bytes per word) value still has to be used
as burst length, other wise transfer issue will be caused.

This patch avoid using dynamic burst in DMA mode by set
reset dynamic_burst when DMA mode is used.

Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
Reported-and-tested-by: Fabio Estevam <fabio.estevam@nxp.com>
---
 drivers/spi/spi-imx.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 19b30cf..2768e64 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -242,6 +242,7 @@ static bool spi_imx_can_dma(struct spi_master *master, struct spi_device *spi,
 		return false;
 
 	spi_imx->wml = i;
+	spi_imx->dynamic_burst = 0;
 
 	return true;
 }
-- 
2.9.3

Applied "spi: imx: only allow dynamic burst in PIO mode" to the spi tree

[Mark Brown]

The patch

   spi: imx: only allow dynamic burst in PIO mode

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 1ce1c618e6b51e80ed1fc8838c01ae8f41582155 Mon Sep 17 00:00:00 2001
From: Jiada Wang <jiada_wang@mentor.com>
Date: Mon, 22 May 2017 13:51:55 +0900
Subject: [PATCH] spi: imx: only allow dynamic burst in PIO mode

Currently only PIO mode supports dynamic burst length adjust,
in DMA mode, bpw (bytes per word) value still has to be used
as burst length, other wise transfer issue will be caused.

This patch avoid using dynamic burst in DMA mode by set
reset dynamic_burst when DMA mode is used.

Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
Reported-and-tested-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-imx.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index b402530a7a9a..2ecbbd04aa55 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -238,6 +238,7 @@ static bool spi_imx_can_dma(struct spi_master *master, struct spi_device *spi,
 		return false;
 
 	spi_imx->wml = i;
+	spi_imx->dynamic_burst = 0;
 
 	return true;
 }
-- 
2.11.0