On Fri, 5 Apr 2019 06:46:02 +0200 Gerd Hoffmann <kra...@redhat.com> wrote:
> drm_connector_update_edid_property can sleep, we must not > call it while holding a spinlock. Move the callsize. s/callsize/callsite/ > > Reported-by: Max Filippov <jcmvb...@gmail.com> > Signed-off-by: Gerd Hoffmann <kra...@redhat.com> > --- > drivers/gpu/drm/virtio/virtgpu_vq.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c > b/drivers/gpu/drm/virtio/virtgpu_vq.c > index e62fe24b1a2e..5bb0f0a084e9 100644 > --- a/drivers/gpu/drm/virtio/virtgpu_vq.c > +++ b/drivers/gpu/drm/virtio/virtgpu_vq.c > @@ -619,11 +619,11 @@ static void virtio_gpu_cmd_get_edid_cb(struct > virtio_gpu_device *vgdev, > output = vgdev->outputs + scanout; > > new_edid = drm_do_get_edid(&output->conn, virtio_get_edid_block, resp); > + drm_connector_update_edid_property(&output->conn, new_edid); > > spin_lock(&vgdev->display_info_lock); > old_edid = output->edid; > output->edid = new_edid; > - drm_connector_update_edid_property(&output->conn, output->edid); > spin_unlock(&vgdev->display_info_lock); > > kfree(old_edid); This gets rid of the sleeping while atomic traces I've been seeing with an s390x guest (both virtio-gpu-pci and virtio-gpu-ccw). Tested-by: Cornelia Huck <coh...@redhat.com> I have also looked at the code a bit, but don't feel confident enough to give an R-b. Acked-by: Cornelia Huck <coh...@redhat.com>
