Re: [PATCH] fpga: zynqpl: fix buffer alignment

On 2/10/21 10:42 PM, Michael Walle wrote:

Due to pointer arithmetic, "sizeof(u32) * ARCH_DMA_MINALIGN" is subtracted. It seems that the original intention was to just subtract ARCH_DMA_MINALIGN. Fix it.

Signed-off-by: Michael Walle michael@walle.cc

drivers/fpga/zynqpl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/fpga/zynqpl.c b/drivers/fpga/zynqpl.c index a11e485525..2de40109a8 100644 --- a/drivers/fpga/zynqpl.c +++ b/drivers/fpga/zynqpl.c @@ -315,7 +315,7 @@ static u32 *zynq_align_dma_buffer(u32 *buf, u32 len, u32 swap) if (new_buf > buf) { debug("%s: Aligned buffer is after buffer start\n", __func__);

• 	new_buf -= ARCH_DMA_MINALIGN;
  

• 	new_buf = (u32 *)((u32)new_buf - ARCH_DMA_MINALIGN);
  

  } printf("%s: Align buffer at %x to %x(swap %d)\n", __func__, (u32)buf, (u32)new_buf, swap);

applied. M