winsys/radeon: fix a race condition in initialization of radeon_winsys::screen

Create the screen in the winsys while the mutex is locked.
This also results in a nice code cleanup!

Reviewed-by: Michel Dänzer <[email protected]>
Reviewed-by: Christian König <[email protected]>

1 files changed, 2 insertions, 12 deletions

diff --git a/src/gallium/targets/pipe-loader/pipe_r600.c b/src/gallium/targets/pipe-loader/pipe_r600.c
index 5d89aca6ec3..0c590875784 100644
--- a/src/gallium/targets/pipe-loader/pipe_r600.c
+++ b/src/gallium/targets/pipe-loader/pipe_r600.c
@@ -7,19 +7,9 @@ static struct pipe_screen *
 create_screen(int fd)
 {
    struct radeon_winsys *rw;
-   struct pipe_screen *screen;
 
-   rw = radeon_drm_winsys_create(fd);
-   if (!rw)
-      return NULL;
-
-   screen = r600_screen_create(rw);
-   if (!screen)
-      return NULL;
-
-   screen = debug_screen_wrap(screen);
-
-   return screen;
+   rw = radeon_drm_winsys_create(fd, r600_screen_create);
+   return rw ? debug_screen_wrap(rw->screen) : NULL;
 }
 
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