In the commit 1f9cd915b64bb95f (dmaengine: sun6i: Fix memcpy operation),
the signed values returned by convert_burst() and convert_buswidth()
were stored in an unsigned value.
Then, these values were considered as errors when non null.
As a result, DMA transfers were rejected when the burst or buswidth
had values different from 1, as 8 for the burst or 4 for the bus width.
Acked-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Jean-Francois Moine <moinejf@xxxxxxx>
---
drivers/dma/sun6i-dma.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c
index 2ec320d..3579ee7 100644
--- a/drivers/dma/sun6i-dma.c
+++ b/drivers/dma/sun6i-dma.c
@@ -281,25 +281,25 @@ static inline int sun6i_dma_cfg_lli(struct sun6i_dma_lli *lli,
dma_addr_t dst, u32 len,
struct dma_slave_config *config)
{
- u8 src_width, dst_width, src_burst, dst_burst;
+ s8 src_width, dst_width, src_burst, dst_burst;
if (!config)
return -EINVAL;
src_burst = convert_burst(config->src_maxburst);
- if (src_burst)
+ if (src_burst < 0)
return src_burst;
dst_burst = convert_burst(config->dst_maxburst);
- if (dst_burst)
+ if (dst_burst < 0)
return dst_burst;
src_width = convert_buswidth(config->src_addr_width);
- if (src_width)
+ if (src_width < 0)
return src_width;
dst_width = convert_buswidth(config->dst_addr_width);
- if (dst_width)
+ if (dst_width < 0)
return dst_width;
lli->cfg = DMA_CHAN_CFG_SRC_BURST(src_burst) |
--
2.7.4
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