NetBSD Problem Report #45354
From www@NetBSD.org Sat Sep 10 15:29:08 2011
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Date: Sat, 10 Sep 2011 15:29:07 +0000 (UTC)
From: y7goto@gmail.com
Reply-To: y7goto@gmail.com
To: gnats-bugs@NetBSD.org
Subject: no character is put in the read-ahead buffer in a console code of arch/arm/imx/imxuart.c
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>Number: 45354
>Category: port-arm
>Synopsis: no character is put in the read-ahead buffer in a console code of arch/arm/imx/imxuart.c
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: port-arm-maintainer
>State: closed
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Sat Sep 10 15:30:00 +0000 2011
>Closed-Date: Fri May 20 07:04:30 +0000 2022
>Last-Modified: Fri May 20 07:04:30 +0000 2022
>Originator: Yuichiro Goto
>Release: 5.99.55
>Organization:
>Environment:
>Description:
When imxuart_common_putc() is called, the input pointer of the read-ahead buffer is advanced, but no character is put in the buffer.
>How-To-Repeat:
See the attached diff.
>Fix:
Index: arch/arm/imx/imxuart.c
===================================================================
RCS file: /cvsroot/src/sys/arch/arm/imx/imxuart.c,v
retrieving revision 1.8
diff -u -r1.8 imxuart.c
--- arch/arm/imx/imxuart.c 24 Apr 2011 16:26:54 -0000 1.8
+++ arch/arm/imx/imxuart.c 10 Sep 2011 14:59:54 -0000
@@ -2198,7 +2198,7 @@
uint32_t usr2;
/* got a character from reading things earlier */
- if (imxuart_readahead_in != imxuart_readahead_out) {
+ if (!READAHEAD_IS_EMPTY()) {
c = imxuart_readahead[imxuart_readahead_out];
imxuart_readahead_out = (imxuart_readahead_out + 1) &
@@ -2240,6 +2240,7 @@
int cn_trapped = 0;
cin = bus_space_read_4(iot, ioh, IMX_URXD);
cn_check_magic(dev, cin & 0xff, imxuart_cnm_state);
+ imxuart_readahead[imxuart_readahead_in] = cin & 0xff;
imxuart_readahead_in = (imxuart_readahead_in + 1) &
(READAHEAD_RING_LEN-1);
}
>Release-Note:
>Audit-Trail:
State-Changed-From-To: open->closed
State-Changed-By: skrll@NetBSD.org
State-Changed-When: Fri, 20 May 2022 07:04:30 +0000
State-Changed-Why:
Fix applied.
Thanks for the PR
>Unformatted:
(Contact us)
$NetBSD: query-full-pr,v 1.46 2020/01/03 16:35:01 leot Exp $
$NetBSD: gnats_config.sh,v 1.9 2014/08/02 14:16:04 spz Exp $
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