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 <per.forlin@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org>
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index f5724d9..2d0c63d 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -2578,6 +2578,14 @@
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);