drm/vkms: No _irqsave within spin_lock_irq needed

irqs are already off.
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
Tested-by: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
Signed-off-by: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190606222751.32567-9-daniel.vetter@ffwll.ch

drivers/gpu/drm/vkms/vkms_crtc.c

@@ -184,17 +184,16 @@ static void vkms_crtc_atomic_flush(struct drm_crtc *crtc,
 				   struct drm_crtc_state *old_crtc_state)
 {
 	struct vkms_output *vkms_output = drm_crtc_to_vkms_output(crtc);
-	unsigned long flags;
 
 	if (crtc->state->event) {
-		spin_lock_irqsave(&crtc->dev->event_lock, flags);
+		spin_lock(&crtc->dev->event_lock);
 
 		if (drm_crtc_vblank_get(crtc) != 0)
 			drm_crtc_send_vblank_event(crtc, crtc->state->event);
 		else
 			drm_crtc_arm_vblank_event(crtc, crtc->state->event);
 
-		spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
+		spin_unlock(&crtc->dev->event_lock);
 
 		crtc->state->event = NULL;
 	}