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Message-ID: <CADnq5_N5hpnu27Q_XgJ2D-ZnVMFsvX3fzapH3yU7R8ynSdZ2vA@mail.gmail.com>
Date: Fri, 6 Jan 2023 10:28:07 -0500
From: Alex Deucher <alexdeucher@...il.com>
To: Harry Wentland <harry.wentland@....com>
Cc: Yi Yang <yiyang13@...wei.com>, sunpeng.li@....com,
Rodrigo.Siqueira@....com, alexander.deucher@....com,
christian.koenig@....com, Xinhui.Pan@....com, airlied@...il.com,
daniel@...ll.ch, dri-devel@...ts.freedesktop.org,
amd-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -next] drm/amd/display: Remove redundant assignment to
variable dc
Applied. Thanks!
Alex
On Thu, Jan 5, 2023 at 2:20 PM Harry Wentland <harry.wentland@....com> wrote:
>
> On 12/16/22 05:23, Yi Yang wrote:
> > Smatch report warning as follows:
> >
> > Line 53679: drivers/gpu/drm/amd/display/dc/core/dc_stream.c:402
> > dc_stream_set_cursor_position() warn: variable dereferenced before
> > check 'stream'
> >
> > The value of 'dc' has been assigned after check whether 'stream' is
> > NULL. Fix it by remove redundant assignment.
> >
> > Signed-off-by: Yi Yang <yiyang13@...wei.com>
>
> If this didn't blow up until now we might not even need
> the NULL check below, but either way this is correct and
>
> Reviewed-by: Harry Wentland <harry.wentland@....com>
>
> Harry
>
> > ---
> > drivers/gpu/drm/amd/display/dc/core/dc_stream.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_stream.c b/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
> > index 20e534f73513..78d31bb875d1 100644
> > --- a/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
> > +++ b/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
> > @@ -408,7 +408,7 @@ bool dc_stream_set_cursor_position(
> > struct dc_stream_state *stream,
> > const struct dc_cursor_position *position)
> > {
> > - struct dc *dc = stream->ctx->dc;
> > + struct dc *dc;
> > bool reset_idle_optimizations = false;
> >
> > if (NULL == stream) {
>
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