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dmaengine: ste_dma40: limit burst size to 16

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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>
This commit is contained in:
Per Forlin 2011-10-13 12:11:36 +02:00 committed by Fabio Baltieri
parent b96710e5b2
commit 92bb6cdb53
1 changed files with 8 additions and 0 deletions
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8
drivers/dma/ste_dma40.c
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@ -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);