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Date: Mon, 12 Mar 2018 18:23:22 -0400
From: Andrey Grodzovsky <Andrey.Grodzovsky@....com>
To: David Binderman <dcb314@...mail.com>,
"alexander.deucher@....com" <alexander.deucher@....com>,
"christian.koenig@....com" <christian.koenig@....com>,
"David1.Zhou@....com" <David1.Zhou@....com>,
"airlied@...ux.ie" <airlied@...ux.ie>,
"amd-gfx@...ts.freedesktop.org" <amd-gfx@...ts.freedesktop.org>,
"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Harry Wentland <harry.wentland@....com>,
"Li, Roman" <Roman.Li@....com>
Subject: Re:
linux-4.16-rc5/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c:1723]:
(warning) Possible null pointer dereference: pipe_ctx
On 03/12/2018 06:22 AM, David Binderman wrote:
> hello there,
>
> Source code is
>
>
> for (i = 0; i < dc->res_pool->pipe_count; i++) {
> if (res_ctx->pipe_ctx[i].stream) {
> pipe_ctx = &res_ctx->pipe_ctx[i];
> *pipe_idx = i;
> break;
> }
> }
Indeed something like
if (!pipe_ctx)
return false;
seems the right thing here.
Harry, Roman , your opinion ?
Andrey
>
> /* Only supports eDP */
> if (pipe_ctx->stream->sink->link->connector_signal != SIGNAL_TYPE_EDP)
> 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
>
> _______________________________________________
> amd-gfx mailing list
> amd-gfx@...ts.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
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