[Mesa-dev] [PATCH 1/2] st/nine: Fix issue with surface and volume dtors and csmt

[Axel Davy]

Surfaces and Volumes can be freed in the worker thread.

This fixes these dtor.
Especially if they were freed by nine_context_box_upload,
the counter was decremented after the destructions, which
lead to deadlock.

Fixes bugzilla 99246.

CC: "17.0" <mesa-stable at lists.freedesktop.org>
Signed-off-by: Axel Davy <axel.davy at ens.fr>
---
 src/gallium/state_trackers/nine/nine_csmt_helper.h |  2 +-
 src/gallium/state_trackers/nine/surface9.c         | 10 ++++++++--
 src/gallium/state_trackers/nine/volume9.c          | 10 ++++++++--
 3 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/src/gallium/state_trackers/nine/nine_csmt_helper.h b/src/gallium/state_trackers/nine/nine_csmt_helper.h
index b0bbc054fc..dc46bbd3a2 100644
--- a/src/gallium/state_trackers/nine/nine_csmt_helper.h
+++ b/src/gallium/state_trackers/nine/nine_csmt_helper.h
@@ -233,8 +233,8 @@ name##_rx( struct NineDevice9 *device, struct csmt_instruction *instr ) \
     name##_priv( \
         device ARGS_FOR_CALL( __VA_ARGS__ ) \
     ); \
-    ARGS_FOR_UNBIND( __VA_ARGS__ ) \
     p_atomic_dec(args->counter); \
+    ARGS_FOR_UNBIND( __VA_ARGS__ ) \
     return 0; \
 } \
 \
diff --git a/src/gallium/state_trackers/nine/surface9.c b/src/gallium/state_trackers/nine/surface9.c
index 836369cafd..d917fa1f86 100644
--- a/src/gallium/state_trackers/nine/surface9.c
+++ b/src/gallium/state_trackers/nine/surface9.c
@@ -204,9 +204,15 @@ NineSurface9_dtor( struct NineSurface9 *This )
 {
     DBG("This=%p\n", This);
 
-    if (This->transfer)
-        NineSurface9_UnlockRect(This);
+    if (This->transfer) {
+        struct pipe_context *pipe = nine_context_get_pipe_multithread(This->base.base.device);
+        pipe->transfer_unmap(pipe, This->transfer);
+        This->transfer = NULL;
+    }
 
+    /* Note: Following condition cannot happen currently, since we
+     * refcount the surface in the functions increasing
+     * pending_uploads_counter. */
     if (p_atomic_read(&This->pending_uploads_counter))
         nine_csmt_process(This->base.base.device);
 
diff --git a/src/gallium/state_trackers/nine/volume9.c b/src/gallium/state_trackers/nine/volume9.c
index 11236a02e7..62af3e6225 100644
--- a/src/gallium/state_trackers/nine/volume9.c
+++ b/src/gallium/state_trackers/nine/volume9.c
@@ -142,9 +142,15 @@ NineVolume9_dtor( struct NineVolume9 *This )
 {
     DBG("This=%p\n", This);
 
-    if (This->transfer)
-        NineVolume9_UnlockBox(This);
+    if (This->transfer) {
+        struct pipe_context *pipe = nine_context_get_pipe_multithread(This->base.device);
+        pipe->transfer_unmap(pipe, This->transfer);
+        This->transfer = NULL;
+    }
 
+    /* Note: Following condition cannot happen currently, since we
+     * refcount the volume in the functions increasing
+     * pending_uploads_counter. */
     if (p_atomic_read(&This->pending_uploads_counter))
         nine_csmt_process(This->base.device);
 
-- 
2.12.0