[src/trunk]: src/sys/arch/arm/imx always re-read status register in the loop.

[mlelstv <mlelstv%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/98a4c05faefe
branches:  trunk
changeset: 981325:98a4c05faefe
user:      mlelstv <mlelstv%NetBSD.org@localhost>
date:      Mon Mar 08 06:23:31 2021 +0000

description:
always re-read status register in the loop.

diffstat:

 sys/arch/arm/imx/imxuart.c |  9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diffs (40 lines):

diff -r e01484a9ab3d -r 98a4c05faefe sys/arch/arm/imx/imxuart.c
--- a/sys/arch/arm/imx/imxuart.c        Sun Mar 07 22:11:01 2021 +0000
+++ b/sys/arch/arm/imx/imxuart.c        Mon Mar 08 06:23:31 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: imxuart.c,v 1.26 2020/11/20 18:16:40 thorpej Exp $ */
+/* $NetBSD: imxuart.c,v 1.27 2021/03/08 06:23:31 mlelstv Exp $ */
 
 /*
  * Copyright (c) 2009, 2010  Genetec Corporation.  All rights reserved.
@@ -96,7 +96,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: imxuart.c,v 1.26 2020/11/20 18:16:40 thorpej Exp $");
+__KERNEL_RCSID(0, "$NetBSD: imxuart.c,v 1.27 2021/03/08 06:23:31 mlelstv Exp $");
 
 #include "opt_imxuart.h"
 #include "opt_ddb.h"
@@ -1720,11 +1720,11 @@
                        cn_check_magic(sc->sc_tty->t_dev,
                                       CNC_BREAK, imxuart_cnm_state);
                        if (cn_trapped)
-                               continue;
+                               goto next;
 #if defined(KGDB) && !defined(DDB)
                        if (ISSET(sc->sc_hwflags, IMXUART_HW_KGDB)) {
                                kgdb_connect(1);
-                               continue;
+                               goto next;
                        }
 #endif
                }
@@ -1776,6 +1776,7 @@
                }
 #endif
 
+next:
                usr2 = bus_space_read_4(iot, ioh, IMX_USR2);
        } while (usr2 & (IMX_USR2_RDR|IMX_USR2_BRCD));