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Date: Fri, 1 Oct 2021 21:11:45 +0300 From: Andy Shevchenko <andy.shevchenko@...il.com> To: Böszörményi Zoltán <zboszor@...il.com> Cc: zboszor@...hu, Mika Westerberg <mika.westerberg@...ux.intel.com>, Andy Shevchenko <andy@...nel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: [PATCH] pinctrl-intel: Fix NULL pointer dereference On Tue, Sep 21, 2021 at 07:07:17AM +0200, Böszörményi Zoltán wrote: > On 2021. 09. 20. 18:00, Andy Shevchenko wrote: > > On Mon, Sep 20, 2021 at 4:00 PM <zboszor@...hu> wrote: > > > On an Elkhart Lake based POS hardware prototype, I got this Oops: ... > > > It's probably a firmware bug, so be overly protective: > > Patch is simply wrong. While Oops will be gone, the driver won't work correctly. > > Of course. But a driver that gives up is better than a > crashing kernel which results in udevd and "udevadm settle" > stalling forever on it. systemd waits about 6 minutes before > continuing the boot process that involves these two services > timing out and this also prevents powering the computer down. Hiding real bugs is not a good strategy. What you may do is blacklisting it. > > Yes, it's either a firmware bug or the driver is outdated (depends > > from which side you look at this issue). > > > > I have heard that new firmware is on its way to the customers, but I > > have no more information right now. > > Thanks, good to know. > > I also reported it to the manufacturer, I hope to receive > a response from them soon. > > The kernel reports other firmware bugs for this > Celeron J6412 based machine. Yeah... -- With Best Regards, Andy Shevchenko
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