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always re-read status register in the loop.

This commit is contained in:
mlelstv 2021-03-08 06:23:31 +00:00
parent 73071b8322
commit 222bc718db
1 changed files with 5 additions and 4 deletions
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9
sys/arch/arm/imx/imxuart.c
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@ -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 @@ imxuintr(void *arg)
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 @@ imxuintr(void *arg)
}
#endif
next:
usr2 = bus_space_read_4(iot, ioh, IMX_USR2);
} while (usr2 & (IMX_USR2_RDR|IMX_USR2_BRCD));