[PATCH xf86-video-amdgpu] sync: Check if miSyncShmScreenInit symbol is resolved at runtime

[Alex Deucher]

On Thu, Dec 10, 2015 at 4:51 AM, Michel Dänzer <michel at daenzer.net> wrote:
> From: Michel Dänzer <michel.daenzer at amd.com>
>
> It may be disabled in the Xorg build, either explicitly or because the
> xshmfence library isn't available.
>
> Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>

Reviewed-by: Alex Deucher <alexander.deucher at amd.com>

> ---
>  src/amdgpu_sync.c | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/src/amdgpu_sync.c b/src/amdgpu_sync.c
> index baade0e..e92f658 100644
> --- a/src/amdgpu_sync.c
> +++ b/src/amdgpu_sync.c
> @@ -87,6 +87,13 @@ amdgpu_sync_init(ScreenPtr screen)
>         AMDGPUInfoPtr info = AMDGPUPTR(scrn);
>         SyncScreenFuncsPtr screen_funcs;
>
> +       if (!xf86LoaderCheckSymbol("miSyncShmScreenInit")) {
> +               xf86DrvMsg(scrn->scrnIndex, X_WARNING,
> +                          "SYNC extension fences disabled because "
> +                          "miSyncShmScreenInit symbol unresolved\n");
> +               return FALSE;
> +       }
> +
>         if (!miSyncShmScreenInit(screen)) {
>                 xf86DrvMsg(scrn->scrnIndex, X_WARNING,
>                            "SYNC extension fences disabled because "
> --
> 2.6.2
>
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