linux-kernel - RE: [GIT PULL REQUEST] watchdog

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Message-ID: <3E54258959B69E4282D79E01AB1F32B7041DB389@DFLE12.ent.ti.com>
Date:	Mon, 24 Sep 2012 11:51:15 +0000
From:	"Karicheri, Muralidharan" <m-karicheri2@...com>
To:	Wim Van Sebroeck <wim@...ana.be>,
	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Linux Watchdog Mailing List <linux-watchdog@...r.kernel.org>,
	Wei Yongjun <yongjun_wei@...ndmicro.com.cn>,
	Toshi Kani <toshi.kani@...com>
Subject: RE: [GIT PULL REQUEST] watchdog - v3.6-rc5 Fixes

>> -----Original Message-----
>> From: linux-watchdog-owner@...r.kernel.org [mailto:linux-watchdog-
>> owner@...r.kernel.org] On Behalf Of Wim Van Sebroeck
>> Sent: Thursday, September 20, 2012 4:14 AM
>> To: Linus Torvalds
>> Cc: Andrew Morton; LKML; Linux Watchdog Mailing List; Wei Yongjun; Toshi Kani
>> Subject: [GIT PULL REQUEST] watchdog - v3.6-rc5 Fixes
>> 
>> Hi Linus,
>> 
>> Please pull from 'master' branch of
>> 	git://www.linux-watchdog.org/linux-watchdog.git
>> 
>> It will fix a kdump issue in hpwdt and a possible NULL dereference.
>> 
>> This will update the following files:
>> 
>>  hpwdt.c         |    3 +++
>>  watchdog_core.c |    3 ++-
>>  2 files changed, 5 insertions(+), 1 deletion(-)
>> 
>> with these Changes:
>> 
>> commit b232a70a1735c004f9ee6fdf363def527b9234b6
>> Author: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
>> Date:   Mon Sep 10 12:41:15 2012 +0800
>> 
>>     watchdog: move the dereference below the NULL test
>> 
>>     The dereference should be moved below the NULL test.
>> 
>>     spatch with a semantic match is used to found this.
>>     (http://coccinelle.lip6.fr/)
>> 
>>     Signed-off-by: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
>>     Signed-off-by: Wim Van Sebroeck <wim@...ana.be>
>> 
>> commit 308b135e4fcc00c80c07e0e04e7afa8edf78583c
>> Author: Toshi Kani <toshi.kani@...com>
>> Date:   Mon Aug 27 12:52:24 2012 -0600
>> 
>>     hpwdt: Fix kdump issue in hpwdt
>> 
>>     kdump can be interrupted by watchdog timer when the timer is left
>>     activated on the crash kernel. Changed the hpwdt driver to disable
>>     watchdog timer at boot-time. This assures that watchdog timer is
>>     disabled until /dev/watchdog is opened, and prevents watchdog timer
>>     to be left running on the crash kernel.
>> 
>>     Signed-off-by: Toshi Kani <toshi.kani@...com>
>>     Tested-by: Lisa Mitchell <lisa.mitchell@...com>
>>     Signed-off-by: Thomas Mingarelli <Thomas.Mingarelli@...com>
>>     Signed-off-by: Wim Van Sebroeck <wim@...ana.be>
>>     Cc: stable <stable@...r.kernel.org>
>> 
>> For completeness, I added the overal diff below.
>> 
>> Greetings,
>> Wim.
>> 
>> ========================================================
>> ========================
>> diff --git a/drivers/watchdog/hpwdt.c b/drivers/watchdog/hpwdt.c
>> index 1eff743..ae60406 100644
>> --- a/drivers/watchdog/hpwdt.c
>> +++ b/drivers/watchdog/hpwdt.c
>> @@ -814,6 +814,9 @@ static int __devinit hpwdt_init_one(struct pci_dev *dev,
>>  	hpwdt_timer_reg = pci_mem_addr + 0x70;
>>  	hpwdt_timer_con = pci_mem_addr + 0x72;
>> 
>> +	/* Make sure that timer is disabled until /dev/watchdog is opened */
>> +	hpwdt_stop();
>> +
>>  	/* Make sure that we have a valid soft_margin */
>>  	if (hpwdt_change_timer(soft_margin))
>>  		hpwdt_change_timer(DEFAULT_MARGIN);
>> diff --git a/drivers/watchdog/watchdog_core.c b/drivers/watchdog/watchdog_core.c
>> index 6aa46a9..3796434 100644
>> --- a/drivers/watchdog/watchdog_core.c
>> +++ b/drivers/watchdog/watchdog_core.c
>> @@ -128,11 +128,12 @@ EXPORT_SYMBOL_GPL(watchdog_register_device);
>>  void watchdog_unregister_device(struct watchdog_device *wdd)
>>  {
>>  	int ret;
>> -	int devno = wdd->cdev.dev;
>> +	int devno;
>> 
>>  	if (wdd == NULL)
>>  		return;
>> 
>> +	devno = wdd->cdev.dev;
>>  	ret = watchdog_dev_unregister(wdd);
>>  	if (ret)
>>  		pr_err("error unregistering /dev/watchdog (err=%d)\n", ret);
>> --
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Wim,

Could you take the watchdog davinci patch as well?  http://www.mail-archive.com/davinci-linux-open-source@linux.davincidsp.com/msg23630.html

I have tried 2 times to send the patch to the linux-watchdog list, but the server is rejecting it for some reason. The second time I tried registering my email id to the list and re-sent, but no success.

Murali
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