[PATCH 4.18 66/88] drm/nouveau/drm/nouveau: Dont forget to cancel hpd_work on suspend/unload

[Greg Kroah-Hartman]

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

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

From: Lyude Paul <ly...@redhat.com>

commit 2f7ca781fd382cf8dde73ed36dfdd93fd05b3332 upstream.

Currently, there's nothing in nouveau that actually cancels this work
struct. So, cancel it on suspend/unload. Otherwise, if we're unlucky
enough hpd_work might try to keep running up until the system is
suspended.

Signed-off-by: Lyude Paul <ly...@redhat.com>
Cc: sta...@vger.kernel.org
Signed-off-by: Ben Skeggs <bske...@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 drivers/gpu/drm/nouveau/nouveau_display.c |    9 ++++++---
 drivers/gpu/drm/nouveau/nouveau_display.h |    2 +-
 drivers/gpu/drm/nouveau/nouveau_drm.c     |    2 +-
 3 files changed, 8 insertions(+), 5 deletions(-)

--- a/drivers/gpu/drm/nouveau/nouveau_display.c
+++ b/drivers/gpu/drm/nouveau/nouveau_display.c
@@ -425,7 +425,7 @@ nouveau_display_init(struct drm_device *
 }
 
 void
-nouveau_display_fini(struct drm_device *dev, bool suspend)
+nouveau_display_fini(struct drm_device *dev, bool suspend, bool runtime)
 {
        struct nouveau_display *disp = nouveau_display(dev);
        struct nouveau_drm *drm = nouveau_drm(dev);
@@ -450,6 +450,9 @@ nouveau_display_fini(struct drm_device *
        }
        drm_connector_list_iter_end(&conn_iter);
 
+       if (!runtime)
+               cancel_work_sync(&drm->hpd_work);
+
        drm_kms_helper_poll_disable(dev);
        disp->fini(dev);
 }
@@ -618,11 +621,11 @@ nouveau_display_suspend(struct drm_devic
                        }
                }
 
-               nouveau_display_fini(dev, true);
+               nouveau_display_fini(dev, true, runtime);
                return 0;
        }
 
-       nouveau_display_fini(dev, true);
+       nouveau_display_fini(dev, true, runtime);
 
        list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
                struct nouveau_framebuffer *nouveau_fb;
--- a/drivers/gpu/drm/nouveau/nouveau_display.h
+++ b/drivers/gpu/drm/nouveau/nouveau_display.h
@@ -62,7 +62,7 @@ nouveau_display(struct drm_device *dev)
 int  nouveau_display_create(struct drm_device *dev);
 void nouveau_display_destroy(struct drm_device *dev);
 int  nouveau_display_init(struct drm_device *dev);
-void nouveau_display_fini(struct drm_device *dev, bool suspend);
+void nouveau_display_fini(struct drm_device *dev, bool suspend, bool runtime);
 int  nouveau_display_suspend(struct drm_device *dev, bool runtime);
 void nouveau_display_resume(struct drm_device *dev, bool runtime);
 int  nouveau_display_vblank_enable(struct drm_device *, unsigned int);
--- a/drivers/gpu/drm/nouveau/nouveau_drm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
@@ -629,7 +629,7 @@ nouveau_drm_unload(struct drm_device *de
        nouveau_debugfs_fini(drm);
 
        if (dev->mode_config.num_crtc)
-               nouveau_display_fini(dev, false);
+               nouveau_display_fini(dev, false, false);
        nouveau_display_destroy(dev);
 
        nouveau_bios_takedown(dev);