Both buffer Transfer Length (TLEN if any) and transfer size have to be
aligned on burst size (burst beats*bus width).

Signed-off-by: Pierre-Yves MORDRET <pierre-yves.mord...@st.com>
---
  Version history:
    v1:
       * Initial
    v2:
---
---
 drivers/dma/stm32-mdma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma/stm32-mdma.c b/drivers/dma/stm32-mdma.c
index daa1602..fbcffa2 100644
--- a/drivers/dma/stm32-mdma.c
+++ b/drivers/dma/stm32-mdma.c
@@ -413,7 +413,7 @@ static u32 stm32_mdma_get_best_burst(u32 buf_len, u32 tlen, 
u32 max_burst,
        u32 best_burst = max_burst;
        u32 burst_len = best_burst * width;
 
-       while ((burst_len > 0) && (tlen % burst_len)) {
+       while ((burst_len > 0) && (((tlen | buf_len) & (burst_len - 1)) != 0)) {
                best_burst = best_burst >> 1;
                burst_len = best_burst * width;
        }
-- 
2.7.4

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