[Bug 49198] glxinfo SIGSEGV in pthread_detach under radeon_drm_cs_destroy under dri2_destroy_context

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=49198

--- Comment #5 from Andre Heider <a.heider at gmail.com> 2012-05-22 04:36:26 PDT ---
This looks dangerous:

1) pipe_semaphore_signal(&cs->flush_queued);
2) pipe_semaphore_wait(&cs->flush_completed);
3) pipe_thread_wait(cs->thread);

There's no guarantee that pipe_semaphore_signal(&cs->flush_completed) in
radeon_drm_cs_emit_ioctl() is executed after 2).
Getting rid of 2) should fix that and it would be safe since 3) blocks until
radeon_drm_cs_emit_ioctl() returns.

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