From: Per Forlin <[email protected]> Maximum DMA seg size is (0xffff x data_width). If max seg size is not set it deafults to 64k. This results in failure if transferring 64k in byte mode. Large seg sizes may be supported by splitting large transfer.
Signed-off-by: Per Forlin <[email protected]> Acked-by: Linus Walleij <[email protected]> Signed-off-by: Fabio Baltieri <[email protected]> --- drivers/dma/ste_dma40.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c index 23c5573..f5724d9 100644 --- a/drivers/dma/ste_dma40.c +++ b/drivers/dma/ste_dma40.c @@ -344,6 +344,7 @@ struct d40_base { int irq; int num_phy_chans; int num_log_chans; + struct device_dma_parameters dma_parms; struct dma_device dma_both; struct dma_device dma_slave; struct dma_device dma_memcpy; @@ -3362,6 +3363,13 @@ static int __init d40_probe(struct platform_device *pdev) if (err) goto failure; + base->dev->dma_parms = &base->dma_parms; + err = dma_set_max_seg_size(base->dev, STEDMA40_MAX_SEG_SIZE); + if (err) { + d40_err(&pdev->dev, "Failed to set dma max seg size\n"); + goto failure; + } + d40_hw_init(base); dev_info(base->dev, "initialized\n"); -- 1.7.12.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
