From 92bb6cdb5302a4b0b3c6b6cfc0854aaed882c4bc Mon Sep 17 00:00:00 2001 From: Per Forlin Date: Thu, 13 Oct 2011 12:11:36 +0200 Subject: dmaengine: ste_dma40: limit burst size to 16 The client is not aware of the maximum burst size in the dma driver. If the size exceeds 16 set max to 16. Signed-off-by: Per Forlin Acked-by: Linus Walleij Acked-by: Vinod Koul Signed-off-by: Fabio Baltieri --- drivers/dma/ste_dma40.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'drivers/dma/ste_dma40.c') diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c index f5724d95ed4..2d0c63dcd84 100644 --- a/drivers/dma/ste_dma40.c +++ b/drivers/dma/ste_dma40.c @@ -2578,6 +2578,14 @@ static int d40_set_runtime_config(struct dma_chan *chan, return -EINVAL; } + if (src_maxburst > 16) { + src_maxburst = 16; + dst_maxburst = src_maxburst * src_addr_width / dst_addr_width; + } else if (dst_maxburst > 16) { + dst_maxburst = 16; + src_maxburst = dst_maxburst * dst_addr_width / src_addr_width; + } + ret = dma40_config_to_halfchannel(d40c, &cfg->src_info, src_addr_width, src_maxburst); -- cgit v1.2.3