From: Marek Vasut <marex@denx.de>
Date: Sun, 14 Oct 2012 02:32:56 +0000 (+0200)
Subject: spi: mxs: Terminate DMA in case of DMA timeout
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=44968466cfb969f960dbe422bbc785117f497729;p=linux-beck.git

spi: mxs: Terminate DMA in case of DMA timeout

In case the SPI DMA times out, the DMA might still be in some kind of
inconsistent state. Issue dmaengine_terminate_all() on the particular
channel to kill off all operations before continuing.

Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
---

diff --git a/drivers/spi/spi-mxs.c b/drivers/spi/spi-mxs.c
index 5a63bcd7a23d..86dd04d6bc87 100644
--- a/drivers/spi/spi-mxs.c
+++ b/drivers/spi/spi-mxs.c
@@ -323,6 +323,7 @@ static int mxs_spi_txrx_dma(struct mxs_spi *spi, int cs,
 	if (!ret) {
 		dev_err(ssp->dev, "DMA transfer timeout\n");
 		ret = -ETIMEDOUT;
+		dmaengine_terminate_all(ssp->dmach);
 		goto err_vmalloc;
 	}