st/dri: fix a crash in server_wait_sync
Ported from i965 including the comment. This fixes: dEQP-EGL.functional.reusable_sync.valid.wait_server Cc: 18.1 <mesa-stable@lists.freedesktop.org> Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
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@ -214,6 +214,12 @@ dri2_server_wait_sync(__DRIcontext *_ctx, void *_fence, unsigned flags)
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struct pipe_context *ctx = dri_context(_ctx)->st->pipe;
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struct dri2_fence *fence = (struct dri2_fence*)_fence;
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/* We might be called here with a NULL fence as a result of WaitSyncKHR
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* on a EGL_KHR_reusable_sync fence. Nothing to do here in such case.
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*/
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if (!fence)
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return;
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if (ctx->fence_server_sync)
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ctx->fence_server_sync(ctx, fence->pipe_fence);
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}
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