[PATCH v2 1/4] drm/exynos: hold event_lock while accessing pageflip_event_list

[Imre Deak]

Signed-off-by: Imre Deak <imre.deak at intel.com>
---
 drivers/gpu/drm/exynos/exynos_drm_crtc.c |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c 
b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
index fce245f..2efa4b0 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
@@ -236,16 +236,21 @@ static int exynos_drm_crtc_page_flip(struct drm_crtc 
*crtc,
                        goto out;
                }

+               spin_lock_irq(&dev->event_lock);
                list_add_tail(&event->base.link,
                                &dev_priv->pageflip_event_list);
+               spin_unlock_irq(&dev->event_lock);

                crtc->fb = fb;
                ret = exynos_drm_crtc_mode_set_base(crtc, crtc->x, crtc->y,
                                                    NULL);
                if (ret) {
                        crtc->fb = old_fb;
+
+                       spin_lock_irq(&dev->event_lock);
                        drm_vblank_put(dev, exynos_crtc->pipe);
                        list_del(&event->base.link);
+                       spin_unlock_irq(&dev->event_lock);

                        goto out;
                }
-- 
1.7.9.5