Also there's a race in the disconnect implemenation. First shut down, then unplug, leaves a window where userspace could sneak in and restart the entire machinery.
With this we can also delete the very un-atomic global pipe_enabled tracking.
Signed-off-by: Daniel Vetter daniel.vetter@intel.com Cc: Hans de Goede hdegoede@redhat.com Cc: "Noralf Trønnes" noralf@tronnes.org --- drivers/gpu/drm/tiny/gm12u320.c | 16 +++------------- 1 file changed, 3 insertions(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/tiny/gm12u320.c b/drivers/gpu/drm/tiny/gm12u320.c index 65dfb87ccb13..c22b2ee470eb 100644 --- a/drivers/gpu/drm/tiny/gm12u320.c +++ b/drivers/gpu/drm/tiny/gm12u320.c @@ -88,7 +88,6 @@ struct gm12u320_device { struct usb_device *udev; unsigned char *cmd_buf; unsigned char *data_buf[GM12U320_BLOCK_COUNT]; - bool pipe_enabled; struct { bool run; struct workqueue_struct *workq; @@ -589,7 +588,6 @@ static void gm12u320_pipe_enable(struct drm_simple_display_pipe *pipe,
gm12u320_fb_mark_dirty(plane_state->fb, &rect); gm12u320_start_fb_update(gm12u320); - gm12u320->pipe_enabled = true; }
static void gm12u320_pipe_disable(struct drm_simple_display_pipe *pipe) @@ -597,7 +595,6 @@ static void gm12u320_pipe_disable(struct drm_simple_display_pipe *pipe) struct gm12u320_device *gm12u320 = pipe->crtc.dev->dev_private;
gm12u320_stop_fb_update(gm12u320); - gm12u320->pipe_enabled = false; }
static void gm12u320_pipe_update(struct drm_simple_display_pipe *pipe, @@ -733,22 +730,17 @@ static int gm12u320_usb_probe(struct usb_interface *interface, static void gm12u320_usb_disconnect(struct usb_interface *interface) { struct drm_device *dev = usb_get_intfdata(interface); - struct gm12u320_device *gm12u320 = dev->dev_private;
- gm12u320_stop_fb_update(gm12u320); drm_dev_unplug(dev); + drm_atomic_helper_shutdown(dev); }
static __maybe_unused int gm12u320_suspend(struct usb_interface *interface, pm_message_t message) { struct drm_device *dev = usb_get_intfdata(interface); - struct gm12u320_device *gm12u320 = dev->dev_private;
- if (gm12u320->pipe_enabled) - gm12u320_stop_fb_update(gm12u320); - - return 0; + return drm_mode_config_helper_suspend(dev); }
static __maybe_unused int gm12u320_resume(struct usb_interface *interface) @@ -757,10 +749,8 @@ static __maybe_unused int gm12u320_resume(struct usb_interface *interface) struct gm12u320_device *gm12u320 = dev->dev_private;
gm12u320_set_ecomode(gm12u320); - if (gm12u320->pipe_enabled) - gm12u320_start_fb_update(gm12u320);
- return 0; + return drm_mode_config_helper_resume(dev); }
static const struct usb_device_id id_table[] = {