The following patch I already sent on 2013-04-18 and 2013-06-06.
Unfortunately it hasn't been committed yet.
Commit 048177ce3b3962852fd34a7e04938959271c7e70 (spi: spi-davinci:
convert to DMA engine API) introduced a regression: dma_map_single()
is called with direction DMA_FROM_DEVICE for rx and for tx.
Signed-off-by: Christian Eggers <cegg...@gmx.de>
Cc: sta...@vger.kernel.org # v3.7.x+
Acked-by: Matt Porter <mpor...@ti.com>
---
--- drivers/spi/spi-davinci.c.orig 2013-04-18 20:54:02.728719412 +0200
+++ drivers/spi/spi-davinci.c 2013-04-18 20:54:51.900623956 +0200
@@ -608,7 +608,7 @@ static int davinci_spi_bufs(struct spi_d
else
buf = (void *)t->tx_buf;
t->tx_dma = dma_map_single(&spi->dev, buf,
- t->len, DMA_FROM_DEVICE);
+ t->len, DMA_TO_DEVICE);
if (!t->tx_dma) {
ret = -EFAULT;
goto err_tx_map;
--
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