diff --git a/drivers/block/sunvdc.c b/drivers/block/sunvdc.c
index 020bd9f1a7b6..24ad56536ed6 100644
--- a/drivers/block/sunvdc.c
+++ b/drivers/block/sunvdc.c
@@ -525,6 +525,23 @@ static int __send_request(struct request *req)
 	err = __vdc_tx_trigger(port);
 	if (err < 0) {
 		printk(KERN_ERR PFX "vdc_tx_trigger() failure, err=%d\n", err);
+		/*
+		 * If the port was reset (-ENOTCONN), the dring and the
+		 * LDC channel including all of its mappings are already
+		 * torn down and reallocated - there is nothing to undo
+		 * and @desc must not be touched.
+		 *
+		 * For any other failure the descriptor was never handed
+		 * to the peer: unmap the cookies and free the descriptor
+		 * again, so that a later retry of the request does not
+		 * leak LDC map table entries.
+		 */
+		if (err != -ENOTCONN) {
+			ldc_unmap(port->vio.lp, desc->cookies,
+				  desc->ncookies);
+			desc->hdr.state = VIO_DESC_FREE;
+			rqe->req = NULL;
+		}
 	} else {
 		port->req_id++;
 		dr->prod = vio_dring_next(dr, dr->prod);