drm/nouveau/kms/nv50: fix setting of HeadSetRasterVertBlankDmi method

Cc: stable@vger.kernel.org	[4.10+]
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nv50_display.c b/drivers/gpu/drm/nouveau/nv50_display.c
index 418872b..f4c8c32 100644 (file)
--- a/drivers/gpu/drm/nouveau/nv50_display.c
+++ b/drivers/gpu/drm/nouveau/nv50_display.c
@@ -2043,6 +2043,7 @@ nv50_head_atomic_check_mode(struct nv50_head *head, struct nv50_head_atom *asyh)
        u32 vbackp  = (mode->vtotal - mode->vsync_end) * vscan / ilace;
        u32 hfrontp =  mode->hsync_start - mode->hdisplay;
        u32 vfrontp = (mode->vsync_start - mode->vdisplay) * vscan / ilace;
+       u32 blankus;
        struct nv50_head_mode *m = &asyh->mode;
 
        m->h.active = mode->htotal;
@@ -2056,9 +2057,10 @@ nv50_head_atomic_check_mode(struct nv50_head *head, struct nv50_head_atom *asyh)
        m->v.blanks = m->v.active - vfrontp - 1;
 
        /*XXX: Safe underestimate, even "0" works */
-       m->v.blankus = (m->v.active - mode->vdisplay - 2) * m->h.active;
-       m->v.blankus *= 1000;
-       m->v.blankus /= mode->clock;
+       blankus = (m->v.active - mode->vdisplay - 2) * m->h.active;
+       blankus *= 1000;
+       blankus /= mode->clock;
+       m->v.blankus = blankus;
 
        if (mode->flags & DRM_MODE_FLAG_INTERLACE) {
                m->v.blank2e =  m->v.active + m->v.synce + vbackp;