drm/radeon/kms/r100: fix bug in CS parser

The first dword of PACKET3_3D_DRAW_IMMD maps to
SE_VTX_FMT so the vertex size is part of the draw
packet.

This patch fixes a possible case where you have a
command buffer that does not contain SE_VTX_FMT
register write, but does contain PACKET3_3D_DRAW_IMMD.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@linux.ie>

diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index 62b27be..11c9a3f 100644 (file)
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -1504,6 +1504,7 @@ static int r100_packet3_check(struct radeon_cs_parser *p,
                        DRM_ERROR("PRIM_WALK must be 3 for IMMD draw\n");
                        return -EINVAL;
                }
+               track->vtx_size = r100_get_vtx_size(radeon_get_ib_value(p, idx + 0));
                track->vap_vf_cntl = radeon_get_ib_value(p, idx + 1);
                track->immd_dwords = pkt->count - 1;
                r = r100_cs_track_check(p->rdev, track);