Mesa (master): st/dri: wait for thread to finish before unbinding context

[Timothy Arceri]

Module: Mesa
Branch: master
Commit: 9e42b93f338d73d5bb97279060cedef70622c1d0
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=9e42b93f338d73d5bb97279060cedef70622c1d0

Author: Timothy Arceri <tarceri at itsqueeze.com>
Date:   Fri Mar 17 11:02:14 2017 +1100

st/dri: wait for thread to finish before unbinding context

Fixes a bunch of piglit crashes that hit an assert() when trying
to delete the framebuffer. The assert() was triggered because
WinSysDrawBuffer was set to NULL before glDeleteFramebuffers()
was called.

Tested-by: Michel Dänzer <michel.daenzer at amd.com>
Reviewed-by: Marek Olšák <marek.olsak at amd.com>

---

 src/gallium/state_trackers/dri/dri_context.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/gallium/state_trackers/dri/dri_context.c b/src/gallium/state_trackers/dri/dri_context.c
index 91d2d1fbbe..92d79849c4 100644
--- a/src/gallium/state_trackers/dri/dri_context.c
+++ b/src/gallium/state_trackers/dri/dri_context.c
@@ -206,6 +206,9 @@ dri_unbind_context(__DRIcontext * cPriv)
 
    if (--ctx->bind_count == 0) {
       if (ctx->st == ctx->stapi->get_current(ctx->stapi)) {
+         if (ctx->st->thread_finish)
+            ctx->st->thread_finish(ctx->st);
+
          /* For conformance, unbind is supposed to flush the context.
           * However, if we do it here we might end up flushing a partially
           * destroyed context. Instead, we flush in dri_make_current and