From: Denis Turischev <denis@compulab.co.il>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Wim Van Sebroeck <wim@iguana.be>, Andrey Panin <pazke@centrinvest.ru>
Subject: I/O operations order fix for SBC-FITPC2 watchdog
Date: Thu, 22 Apr 2010 19:50:03 +0300 [thread overview]
Message-ID: <4BD07E3B.3030504@compulab.co.il> (raw)
In-Reply-To: <4B58603F.5030407@compulab.co.il>
sbc_fitpc2_wdt: fixed I/O operations order
There are fitpc2 compatible boards that hang with existent i/o
operations order. Solution is to switch between writing to data
and command ports.
Signed-off-by: Denis Turischev <denis@compulab.co.il>
---
drivers/watchdog/sbc_fitpc2_wdt.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/watchdog/sbc_fitpc2_wdt.c b/drivers/watchdog/sbc_fitpc2_wdt.c
index 8d44c9b..226f0f2 100644
--- a/drivers/watchdog/sbc_fitpc2_wdt.c
+++ b/drivers/watchdog/sbc_fitpc2_wdt.c
@@ -45,10 +45,10 @@ static DEFINE_SPINLOCK(wdt_lock);
static void wdt_send_data(unsigned char command, unsigned char data)
{
- outb(command, COMMAND_PORT);
- msleep(100);
outb(data, DATA_PORT);
msleep(200);
+ outb(command, COMMAND_PORT);
+ msleep(100);
}
static void wdt_enable(void)
next prev parent reply other threads:[~2010-04-22 16:51 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-20 15:53 [PATCH] add SBC-FITPC2 watchdog driver Mike Rapoport
2009-07-20 16:43 ` Joe Perches
2009-07-21 4:34 ` [PATCH 0/3] drivers/watchdog: Use pr_<level> Joe Perches
2009-07-21 4:35 ` [PATCH 1/3] include/linux: kernel.h dynamic_debug.h device.h - Use section fmts Joe Perches
2009-07-21 4:35 ` [PATCH 2/3] drivers/watchdog: Convert printk(KERN_<level> to pr_<level>( Joe Perches
2009-07-21 4:35 ` [PATCH 3/3] drivers/watchdog: use pr_fmt Joe Perches
2009-11-05 11:32 ` SBC-FITPC2 watchdog driver fix Denis Turischev
2009-11-05 11:51 ` Wim Van Sebroeck
2010-01-21 14:10 ` Denis Turischev
2010-04-22 16:50 ` Denis Turischev [this message]
2010-04-22 16:54 ` "scheduling while atomic" bug in SBC-FITPC2 watchdog Denis Turischev
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4BD07E3B.3030504@compulab.co.il \
--to=denis@compulab.co.il \
--cc=linux-kernel@vger.kernel.org \
--cc=pazke@centrinvest.ru \
--cc=wim@iguana.be \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox