Index: geom_vfs.c
===================================================================
--- geom_vfs.c	(wersja 185318)
+++ geom_vfs.c	(kopia robocza)
@@ -97,6 +97,15 @@
 	cp = bo->bo_private;
 	G_VALID_CONSUMER(cp);
 
+	if (cp->provider == NULL) {
+		bp->b_error = EXDEV;
+		vfslocked = VFS_LOCK_GIANT(((struct mount *)NULL));
+		/* XXXPJD: Can we call bufdone() from here? */
+		bufdone(bp);
+		VFS_UNLOCK_GIANT(vfslocked);
+		return;
+	}
+
 	bip = g_alloc_bio();
 	bip->bio_cmd = bp->b_iocmd;
 	bip->bio_offset = bp->b_iooffset;
@@ -123,6 +132,8 @@
 	 * Down the road, this is the place where we could give the user
 	 * a "Abort, Retry or Ignore" option to replace the media again.
 	 */
+	g_access(cp, -cp->acr, -cp->acw, -cp->ace);
+	g_detach(cp);
 }
 
 int