[PATCH] Fix NULL deref in evergreen_cp_wait_vline_sync

[Alex Deucher]

2010/9/8  <mathieu.berard at crans.org>:
> From: Mathieu Bérard <mathieu at mberard.eu>
>
> Hello,
> a patch for a Xorg segfault triggered here by running rendercheck
> with radeon ddx from the evergreen-accel branch
>
> ---
>  src/evergreen_accel.c |    4 +++-
>  1 files changed, 3 insertions(+), 1 deletions(-)
>

Pushed.  thanks!

> diff --git a/src/evergreen_accel.c b/src/evergreen_accel.c
> index d319bc2..38666ee 100644
> --- a/src/evergreen_accel.c
> +++ b/src/evergreen_accel.c
> @@ -242,12 +242,14 @@ void evergreen_cp_wait_vline_sync(ScrnInfoPtr pScrn, PixmapPtr pPix,
>                                  xf86CrtcPtr crtc, int start, int stop)
>  {
>     RADEONInfoPtr  info = RADEONPTR(pScrn);
> -    drmmode_crtc_private_ptr drmmode_crtc = crtc->driver_private;
> +    drmmode_crtc_private_ptr drmmode_crtc;
>     uint32_t offset;
>
>     if (!crtc)
>         return;
>
> +    drmmode_crtc = crtc->driver_private;
> +
>     if (stop < start)
>         return;
>
> --
> 1.7.1
>
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