lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Fri, 19 Sep 2014 11:25:50 -0500
From:	Josh Cartwright <>
To:	Guenter Roeck <>
Cc:	Wim Van Sebroeck <>,
	Grant Likely <>,
	Rob Herring <>,,,,, Kumar Gala <>,
Subject: Re: [PATCH 1/3] watchdog: qcom: add support for KPSS WDT

On Thu, Sep 18, 2014 at 08:41:43PM -0700, Guenter Roeck wrote:
> On 09/18/2014 08:24 PM, Josh Cartwright wrote:
> >On Thu, Sep 18, 2014 at 07:41:17PM -0700, Guenter Roeck wrote:
> >>On 09/18/2014 03:26 PM, Josh Cartwright wrote:
> >>>Add a driver for the watchdog timer block found in the Krait Processor
> >>>Subsystem (KPSS) on the MSM8960, APQ8064, and IPQ8064.
> >>>
> >>>Signed-off-by: Josh Cartwright <>
> >>
> >>Hi Josh,
> >>
> >>comments inline.
> >
> >Thanks for taking a look!
> >
> >>>+	watchdog_init_timeout(&wdt->wdd, 0, &pdev->dev);
> >>
> >>That leaves you with no default timeout if timeout-sec is not set in devicetree,
> >>which if I understand the code correctly might result in an immediate reset.
> >>Is this really what you want to happen ?
> >
> >I think I'd like to handle timeout-sec being unspecified as an error at
> >probe.  If someone explicitly sets timeout-sec = <0>, then they get what
> >they ask for.  I'll take another look to see how to make this happen.
> >
> Hmm.. kind of unusual. Usual would be to initialize the timeout together
> with min_timeout / max_timeout above and only force the user to specify
> a value if the default timeout is not desirable. You don't really gain
> anything by making timeout-sec mandatory.

Making timeout-sec mandatory makes it so I don't have to decide what a
"sane default" is. :)

It's even less clear about what a sane default is looking at the other
watchdog drivers.  From the drivers I looked at, it ranges any where
from 30s to 2mins.  Am I just to choose?  Why do these even differ
between all of the drivers?

Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
hosted by The Linux Foundation
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

Powered by blists - more mailing lists