Thread (46 messages) 46 messages, 6 authors, 2016-02-07

[PATCH v10 5/5] Watchdog: ARM SBSA Generic Watchdog half timeout panic support

From: Thomas Petazzoni <hidden>
Date: 2016-02-05 13:03:08
Also in: linux-devicetree, linux-watchdog, lkml

Hello,

On Fri, 5 Feb 2016 17:51:52 +0800, Fu Wei wrote:
OK, my thought is

if panic is enabled :
|--------WOR-------WS0--------WOR-------WS1
|------timeout------(panic)------timeout-----reset
I'm quite certainly missing something completely obvious here, but how
can you get the WS1 interrupt *after* raising a panic? Aren't all
interrupts disabled and the system fully halted once you get a panic(),
especially when raised from an interrupt handler? If that's the case,
how can the system continue to do things, such as receiving the WS1
interrupt and resetting ?

Again, I'm probably missing something obvious, but I'm interested to
understand the reasoning here.

Thanks!

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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