Re: [PATCH 2/4] hw/dma: Break the loop when loading descriptions fails

[Frank Chang]

Reviewed-by: Frank Chang <frank.chang@sifive.com>

Fea.Wang <fea.wang@sifive.com> 於 2024年6月3日 週一 下午1:48寫道：
>
> When calling the loading a description function, it should be noticed
> that the function may return a failure value. Breaking the loop is one
> of the possible ways to handle it.
>
> Signed-off-by: Fea.Wang <fea.wang@sifive.com>
> ---
>  hw/dma/xilinx_axidma.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/hw/dma/xilinx_axidma.c b/hw/dma/xilinx_axidma.c
> index 4b475e5484..b8ab5a423d 100644
> --- a/hw/dma/xilinx_axidma.c
> +++ b/hw/dma/xilinx_axidma.c
> @@ -291,7 +291,9 @@ static void stream_process_mem2s(struct Stream *s, 
> StreamSink *tx_data_dev,
>      }
>
>      while (1) {
> -        stream_desc_load(s, s->regs[R_CURDESC]);
> +        if (MEMTX_OK != stream_desc_load(s, s->regs[R_CURDESC])) {
> +            break;
> +        }
>
>          if (s->desc.status & SDESC_STATUS_COMPLETE) {
>              s->regs[R_DMASR] |= DMASR_HALTED;
> @@ -348,7 +350,9 @@ static size_t stream_process_s2mem(struct Stream *s, 
> unsigned char *buf,
>      }
>
>      while (len) {
> -        stream_desc_load(s, s->regs[R_CURDESC]);
> +        if (MEMTX_OK != stream_desc_load(s, s->regs[R_CURDESC])) {
> +            break;
> +        }
>
>          if (s->desc.status & SDESC_STATUS_COMPLETE) {
>              s->regs[R_DMASR] |= DMASR_HALTED;
> --
> 2.34.1
>
>