[PATCH] common: bouncebuf: Add missing cast to dma_addr_t

[Andrew Davis]

On 8/13/23 6:47 PM, Marek Vasut wrote:
> Fix the following warning produced on qemu-x86_64_defconfig:
> 
> "
> common/bouncebuf.c: In function ‘bounce_buffer_stop’:
> common/bouncebuf.c:82:34: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
>     82 |                 dma_unmap_single((dma_addr_t)state->bounce_buffer,
>        |                                  ^
> "
> 
> The warning is valid, the pointer has to be up-cast first.

This is really a narrowing cast, void*/ulong are 64bit and dma_addr_t
is 32bit on x86 (assume this is always good enough?), anyway seems fine,

Reviewed-by: Andrew Davis <afd at ti.com>

> 
> Signed-off-by: Marek Vasut <marek.vasut+renesas at mailbox.org>
> ---
> Cc: Andrew Davis <afd at ti.com>
> Cc: Simon Glass <sjg at chromium.org>
> ---
>   common/bouncebuf.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/common/bouncebuf.c b/common/bouncebuf.c
> index 93a35668cc2..934b83f7ec3 100644
> --- a/common/bouncebuf.c
> +++ b/common/bouncebuf.c
> @@ -79,7 +79,7 @@ int bounce_buffer_stop(struct bounce_buffer *state)
>   {
>   	if (state->flags & GEN_BB_WRITE) {
>   		/* Invalidate cache so that CPU can see any newly DMA'd data */
> -		dma_unmap_single((dma_addr_t)state->bounce_buffer,
> +		dma_unmap_single((dma_addr_t)(uintptr_t)state->bounce_buffer,
>   				 state->len_aligned,
>   				 DMA_BIDIRECTIONAL);
>   	}