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authorPer Forlin <per.forlin@stericsson.com>2011-10-13 12:11:36 +0200
committerFabio Baltieri <fabio.baltieri@linaro.org>2013-01-14 10:50:27 +0100
commit92bb6cdb5302a4b0b3c6b6cfc0854aaed882c4bc (patch)
treecad01bad6f27e959d94e8261499fb72fb9544173 /drivers/dma/ste_dma40.c
parentb96710e5b22609aa6e4ba5c3936ea7f026a7c427 (diff)
downloadop-kernel-dev-92bb6cdb5302a4b0b3c6b6cfc0854aaed882c4bc.zip
op-kernel-dev-92bb6cdb5302a4b0b3c6b6cfc0854aaed882c4bc.tar.gz
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>
Diffstat (limited to 'drivers/dma/ste_dma40.c')
-rw-r--r--drivers/dma/ste_dma40.c8
1 files changed, 8 insertions, 0 deletions
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 @@ 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);
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