diff options
Diffstat (limited to 'recipes-kernel/linux/linux-3.12.70/linux-3.12-spi-atmel-dma-min.patch')
| -rw-r--r-- | recipes-kernel/linux/linux-3.12.70/linux-3.12-spi-atmel-dma-min.patch | 18 |
1 files changed, 0 insertions, 18 deletions
diff --git a/recipes-kernel/linux/linux-3.12.70/linux-3.12-spi-atmel-dma-min.patch b/recipes-kernel/linux/linux-3.12.70/linux-3.12-spi-atmel-dma-min.patch deleted file mode 100644 index 4aba504..0000000 --- a/recipes-kernel/linux/linux-3.12.70/linux-3.12-spi-atmel-dma-min.patch +++ /dev/null @@ -1,18 +0,0 @@ -Index: linux-3.12.27/drivers/spi/spi-atmel.c -=================================================================== ---- linux-3.12.27.orig/drivers/spi/spi-atmel.c -+++ linux-3.12.27/drivers/spi/spi-atmel.c -@@ -187,7 +187,12 @@ - /* use PIO for small transfers, avoiding DMA setup/teardown overhead and - * cache operations; better heuristics consider wordsize and bitrate. - */ --#define DMA_MIN_BYTES 16 -+ -+/* MTS: set DMA_MIN_BYTES=0 to use DMA all the time due to Rx buffer issues -+ * when switching between smaller PIO and larger DMA transfers -+ * https://lkml.org/lkml/2013/10/21/534 -+ */ -+#define DMA_MIN_BYTES 0 - - struct atmel_spi_dma { - struct dma_chan *chan_rx; |