linux-kernel - Re: [PATCH 00/15] net: taint when the device driver firmware crashes

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Date:   Sat, 9 May 2020 18:01:51 -0700
From:   Shannon Nelson <snelson@...sando.io>
To:     Luis Chamberlain <mcgrof@...nel.org>, jeyu@...nel.org
Cc:     akpm@...ux-foundation.org, arnd@...db.de, rostedt@...dmis.org,
        mingo@...hat.com, aquini@...hat.com, cai@....pw, dyoung@...hat.com,
        bhe@...hat.com, peterz@...radead.org, tglx@...utronix.de,
        gpiccoli@...onical.com, pmladek@...e.com, tiwai@...e.de,
        schlad@...e.de, andriy.shevchenko@...ux.intel.com,
        keescook@...omium.org, daniel.vetter@...ll.ch, will@...nel.org,
        mchehab+samsung@...nel.org, kvalo@...eaurora.org,
        davem@...emloft.net, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 00/15] net: taint when the device driver firmware crashes

On 5/8/20 9:35 PM, Luis Chamberlain wrote:
> Device driver firmware can crash, and sometimes, this can leave your
> system in a state which makes the device or subsystem completely
> useless. Detecting this by inspecting /proc/sys/kernel/tainted instead
> of scraping some magical words from the kernel log, which is driver
> specific, is much easier. So instead this series provides a helper which
> lets drivers annotate this and shows how to use this on networking
> drivers.
>
If the driver is able to detect that the device firmware has come back 
alive, through user intervention or whatever, should there be a way to 
"untaint" the kernel?  Or would you expect it to remain tainted?

sln