nv50,nvc0: make sure there's pushbuf space and that we ref the bo early

First off, we can't flush in the middle of a command. Secondly
requesting the extra push space might cause a flush to happen. If that
flush happens, we'd have to do the PUSH_REFN again. So instead do
PUSH_REFN after the push space request. This helps avoid rare crashes
with supertuxkart in libdrm due to assertion failures.

Signed-off-by: Ilia Mirkin <[email protected]>
Cc: "11.0 11.1" <[email protected]>
(cherry picked from commit c1d14c6817e3fa9a1c04f9b6c51b4ca601637843)
[Emil Velikov: resolve trivial conflict]
Signed-off-by: Emil Velikov <[email protected]>

Conflicts:
	src/gallium/drivers/nouveau/nvc0/nvc0_vbo.c

0 files changed, 0 insertions, 0 deletions