[PATCH v1 1/2] dma: ti: k3-udma: fix dma_addr_t typecasts

[Kumar, Udit]

On 8/25/2025 7:02 PM, Anshul Dalal wrote:
> With the change to dma_addr_t from u32 to u64 for the R5 SPL, the
> existing typecasts from void* to int or vice-versa cause the compiler to
> throw a "cast from pointer to integer of different size".

is this some compiler specific ?. Please mention that

I don't see this warning 
https://gist.github.com/uditkumarti/1c4238a7101d97cdc57b7a40d10147d2

I am on  gcc version 11.3.1 20220712 (Arm GNU Toolchain 11.3.Rel1)


> Therefore this patch changes the casts to a uintptr_t which is
> guaranteed to hold any pointer value, thus supressing the compiler
> warning.
>
> Signed-off-by: Anshul Dalal <anshuld at ti.com>
> ---
>   drivers/dma/ti/k3-udma.c | 6 +++---
>   1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
> index 723265ab2e5..01824310995 100644
> --- a/drivers/dma/ti/k3-udma.c
> +++ b/drivers/dma/ti/k3-udma.c
> @@ -2327,7 +2327,7 @@ static int udma_send(struct dma *dma, void *src, size_t len, void *metadata)
>   {
>   	struct udma_dev *ud = dev_get_priv(dma->dev);
>   	struct cppi5_host_desc_t *desc_tx;
> -	dma_addr_t dma_src = (dma_addr_t)src;
> +	dma_addr_t dma_src = (uintptr_t)src;
>   	struct ti_udma_drv_packet_data packet_data = { 0 };
>   	dma_addr_t paddr;
>   	struct udma_chan *uc;
> @@ -2426,7 +2426,7 @@ static int udma_receive(struct dma *dma, void **dst, void *metadata)
>   
>   	cppi5_desc_get_tags_ids(&desc_rx->hdr, &port_id, NULL);
>   
> -	*dst = (void *)buf_dma;
> +	*dst = (void *)(uintptr_t)buf_dma;
>   	uc->num_rx_bufs--;
>   
>   	return pkt_len;
> @@ -2518,7 +2518,7 @@ int udma_prepare_rcv_buf(struct dma *dma, void *dst, size_t size)
>   
>   	desc_num = uc->desc_rx_cur % UDMA_RX_DESC_NUM;
>   	desc_rx = uc->desc_rx + (desc_num * uc->config.hdesc_size);
> -	dma_dst = (dma_addr_t)dst;
> +	dma_dst = (uintptr_t)dst;
>   
>   	cppi5_hdesc_reset_hbdesc(desc_rx);
>