[PATCH] fpga: zynqpl: fix buffer alignment

[Michal Simek]

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 at 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