From: Amelie Delaunay amelie.delaunay@foss.st.com
[ Upstream commit b20fd5fa310cbf7ec367f263a34382a24c4cee73 ]
buf_addr parameter of stm32_dma_set_xfer_param function is a dma_addr_t. We only need to check the remainder of buf_addr/max_width, so, no need to use do_div and extra u64 addr. Use '%' instead.
Fixes: e0ebdbdcb42a ("dmaengine: stm32-dma: take address into account when computing max width") Signed-off-by: Amelie Delaunay amelie.delaunay@foss.st.com Link: https://lore.kernel.org/r/20211011094259.315023-3-amelie.delaunay@foss.st.co... Signed-off-by: Vinod Koul vkoul@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/dma/stm32-dma.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/dma/stm32-dma.c b/drivers/dma/stm32-dma.c index 7dd1d3d0bf063..a5dab5510e625 100644 --- a/drivers/dma/stm32-dma.c +++ b/drivers/dma/stm32-dma.c @@ -268,7 +268,6 @@ static enum dma_slave_buswidth stm32_dma_get_max_width(u32 buf_len, u32 threshold) { enum dma_slave_buswidth max_width; - u64 addr = buf_addr;
if (threshold == STM32_DMA_FIFO_THRESHOLD_FULL) max_width = DMA_SLAVE_BUSWIDTH_4_BYTES; @@ -279,7 +278,7 @@ static enum dma_slave_buswidth stm32_dma_get_max_width(u32 buf_len, max_width > DMA_SLAVE_BUSWIDTH_1_BYTE) max_width = max_width >> 1;
- if (do_div(addr, max_width)) + if (buf_addr % max_width) max_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
return max_width;