--- lum/arch/um/drivers/ubd.c.orig	Wed Mar 13 14:04:59 2002
+++ lum/arch/um/drivers/ubd.c	Thu Mar 28 23:39:15 2002
@@ -693,14 +697,23 @@
 		spin_unlock(&io_request_lock);
 		return(1);
 	}
-	if((req->cmd == WRITE) && 
-	   ((dev->openflags & O_ACCMODE) == O_RDONLY)){
-		printk("Write attempted on readonly ubd device %d\n", 
-		       minor(req->rq_dev));
-		spin_lock(&io_request_lock);
-		end_request(0);
-		spin_unlock(&io_request_lock);
-		return(1);
+	if (req->cmd == WRITE) {
+#ifdef CONFIG_DEV_RDONLY
+		if (dev_check_rdonly(req->rq_dev)) {
+			spin_lock(&io_request_lock);
+			end_request(1);
+			spin_unlock(&io_request_lock);
+			return(0);
+		}
+#endif
+		if ((dev->openflags & O_ACCMODE) == O_RDONLY) {
+			printk("Write attempted on readonly ubd device %d\n",
+			       minor(req->rq_dev));
+			spin_lock(&io_request_lock);
+			end_request(0);
+			spin_unlock(&io_request_lock);
+			return(1);
+		}
 	}
 
         block = req->sector;