drm/nouveau: set irq_enabled manually

Since commit 0fa9061ae8c ("drm/nouveau/mc: handle irq-related setup
ourselves"), drm_device->irq_enabled remained unset. This is needed in
order to properly wait for a vblank event in the generic drm code.

See https://bugs.freedesktop.org/show_bug.cgi?id=74195

Reported-by: Jan Janecek <janjanjanx@gmail.com>
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: stable@vger.kernel.org # 3.10+
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c
index 78c8e7146d56..89c484d8ac26 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
@@ -376,6 +376,8 @@ nouveau_drm_load(struct drm_device *dev, unsigned long flags)
         if (ret)
                 goto fail_device;
 
+        dev->irq_enabled = true;
+
         /* workaround an odd issue on nvc1 by disabling the device's
          * nosnoop capability.  hopefully won't cause issues until a
          * better fix is found - assuming there is one...
@@ -475,6 +477,7 @@ nouveau_drm_remove(struct pci_dev *pdev)
         struct nouveau_drm *drm = nouveau_drm(dev);
         struct nouveau_object *device;
 
+        dev->irq_enabled = false;
         device = drm->client.base.device;
         drm_put_dev(dev);