[Mesa-dev] [PATCH] gallium: Check pipe_screen::resource_changed before dereferencing it

[Michel Dänzer]

From: Michel Dänzer <michel.daenzer at amd.com>

It's optional, only implemented by the etnaviv driver so far.

Fixes: 501d0edeca32 "st/mesa: call resource_changed when binding a
                     EGLImage to a texture"
Fixes: a37cf630b4d1 "gallium: add pipe_screen::resource_changed callback
                     wrappers"
Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>
---
 src/gallium/auxiliary/driver_ddebug/dd_screen.c | 3 ++-
 src/gallium/auxiliary/driver_rbug/rbug_screen.c | 3 ++-
 src/gallium/auxiliary/driver_trace/tr_screen.c  | 3 ++-
 src/mesa/state_tracker/st_cb_eglimage.c         | 3 ++-
 4 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/gallium/auxiliary/driver_ddebug/dd_screen.c b/src/gallium/auxiliary/driver_ddebug/dd_screen.c
index 5b2be28a969..5f922d884fe 100644
--- a/src/gallium/auxiliary/driver_ddebug/dd_screen.c
+++ b/src/gallium/auxiliary/driver_ddebug/dd_screen.c
@@ -284,7 +284,8 @@ dd_screen_resource_changed(struct pipe_screen *_screen,
 {
    struct pipe_screen *screen = dd_screen(_screen)->screen;
 
-   screen->resource_changed(screen, res);
+   if (screen->resource_changed)
+      screen->resource_changed(screen, res);
 }
 
 static void
diff --git a/src/gallium/auxiliary/driver_rbug/rbug_screen.c b/src/gallium/auxiliary/driver_rbug/rbug_screen.c
index 2477edbadf0..a1a77add734 100644
--- a/src/gallium/auxiliary/driver_rbug/rbug_screen.c
+++ b/src/gallium/auxiliary/driver_rbug/rbug_screen.c
@@ -222,7 +222,8 @@ rbug_screen_resource_changed(struct pipe_screen *_screen,
    struct pipe_screen *screen = rb_screen->screen;
    struct pipe_resource *resource = rb_resource->resource;
 
-   screen->resource_changed(screen, resource);
+   if (screen->resource_changed)
+      screen->resource_changed(screen, resource);
 }
 
 static void
diff --git a/src/gallium/auxiliary/driver_trace/tr_screen.c b/src/gallium/auxiliary/driver_trace/tr_screen.c
index d5a81249b51..704b2a3c72d 100644
--- a/src/gallium/auxiliary/driver_trace/tr_screen.c
+++ b/src/gallium/auxiliary/driver_trace/tr_screen.c
@@ -444,7 +444,8 @@ trace_screen_resource_changed(struct pipe_screen *_screen,
    trace_dump_arg(ptr, screen);
    trace_dump_arg(ptr, resource);
 
-   screen->resource_changed(screen, resource);
+   if (screen->resource_changed)
+      screen->resource_changed(screen, resource);
 
    trace_dump_call_end();
 }
diff --git a/src/mesa/state_tracker/st_cb_eglimage.c b/src/mesa/state_tracker/st_cb_eglimage.c
index 4f33cb4bb06..0db2efc01cf 100644
--- a/src/mesa/state_tracker/st_cb_eglimage.c
+++ b/src/mesa/state_tracker/st_cb_eglimage.c
@@ -229,7 +229,8 @@ st_bind_egl_image(struct gl_context *ctx,
    pipe_resource_reference(&stObj->pt, stimg->texture);
    st_texture_release_all_sampler_views(st, stObj);
    pipe_resource_reference(&stImage->pt, stObj->pt);
-   st->pipe->screen->resource_changed(st->pipe->screen, stImage->pt);
+   if (st->pipe->screen->resource_changed)
+      st->pipe->screen->resource_changed(st->pipe->screen, stImage->pt);
 
    stObj->surface_format = stimg->format;
    stObj->level_override = stimg->level;
-- 
2.18.0