3.8.13.11 -stable review patch.  If anyone has any objections, please let me 
know.

------------------

From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <[email protected]>

commit f2f5f771c5fc0fa252cde3d0d0452dcc785cc17a upstream.

On HSW enabling a plane on a disabled pipe may hang the entire system.
And there's no good reason for doing it ever, so just don't.

v2: Move the crtc active checks to intel_crtc_cursor_{set,move} to
    avoid confusing people during modeset

Signed-off-by: Ville Syrjälä <[email protected]>
Tested-by: Paulo Zanoni <[email protected]>
Reviewed-by: Paulo Zanoni <[email protected]>
Signed-off-by: Daniel Vetter <[email protected]>
[ kamal: backport to 3.8 (context) ]
Signed-off-by: Kamal Mostafa <[email protected]>
---
 drivers/gpu/drm/i915/intel_display.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c 
b/drivers/gpu/drm/i915/intel_display.c
index 3e4e629..a38cbdc 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6519,7 +6519,8 @@ static int intel_crtc_cursor_set(struct drm_crtc *crtc,
        intel_crtc->cursor_width = width;
        intel_crtc->cursor_height = height;
 
-       intel_crtc_update_cursor(crtc, true);
+       if (intel_crtc->active)
+               intel_crtc_update_cursor(crtc, true);
 
        return 0;
 fail_unpin:
@@ -6538,7 +6539,8 @@ static int intel_crtc_cursor_move(struct drm_crtc *crtc, 
int x, int y)
        intel_crtc->cursor_x = x;
        intel_crtc->cursor_y = y;
 
-       intel_crtc_update_cursor(crtc, true);
+       if (intel_crtc->active)
+               intel_crtc_update_cursor(crtc, true);
 
        return 0;
 }
-- 
1.8.1.2

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