linux-4.16-rc5/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c:1723]: (warning) Possible null pointer dereference: pipe_ctx

[Andrey.Grodzovsky@xxxxxxx (Andrey Grodzovsky)]

On 03/12/2018 06:22 AM, David Binderman wrote:
> hello there,
>
> Source code is
>
>
>  Â Â Â  for (i = 0; i < dc->res_pool->pipe_count; i++) {
>  Â Â Â Â Â Â Â  if (res_ctx->pipe_ctx[i].stream) {
>  Â Â Â Â Â Â Â Â Â Â Â  pipe_ctx = &res_ctx->pipe_ctx[i];
>  Â Â Â Â Â Â Â Â Â Â Â  *pipe_idx = i;
>  Â Â Â Â Â Â Â Â Â Â Â  break;
>  Â Â Â Â Â Â Â  }
>  Â Â Â  }

Indeed something like

if (!pipe_ctx)
 Â Â Â Â Â Â Â Â Â Â Â Â Â  return false;

seems the right thing here.

Harry, Roman , your opinion ?

Andrey

>
>  Â Â Â  /* Only supports eDP */
>  Â Â Â  if (pipe_ctx->stream->sink->link->connector_signal != SIGNAL_TYPE_EDP)
>  Â Â Â Â Â Â Â  return false;
>
> Suggest add some code to deal with the case that the for loop doesn't find
> what it is looking for and so pipe_ctx is NULL.
>
> Regards
>
> David Binderman
>      
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