diff options
| -rw-r--r-- | drivers/dma/stm32-mdma.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/drivers/dma/stm32-mdma.c b/drivers/dma/stm32-mdma.c index daa1602..4c7634c 100644 --- a/drivers/dma/stm32-mdma.c +++ b/drivers/dma/stm32-mdma.c @@ -410,13 +410,10 @@ static enum dma_slave_buswidth stm32_mdma_get_max_width(dma_addr_t addr, static u32 stm32_mdma_get_best_burst(u32 buf_len, u32 tlen, u32 max_burst, enum dma_slave_buswidth width) { - u32 best_burst = max_burst; - u32 burst_len = best_burst * width; + u32 best_burst; - while ((burst_len > 0) && (tlen % burst_len)) { - best_burst = best_burst >> 1; - burst_len = best_burst * width; - } + best_burst = min((u32)1 << __ffs(tlen | buf_len), + max_burst * width) / width; return (best_burst > 0) ? best_burst : 1; } |
