linux-kernel - Re: [PATCH AUTOSEL 4.9 18/25] MIPS: perf: ath79: Fix perfcount IRQ assignment

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Date:   Sun, 9 Jun 2019 12:05:02 +0200
From:   Greg KH <greg@...ah.com>
To:     Petr Štetiar <ynezz@...e.cz>
Cc:     sashal@...nel.org, jason@...edaemon.net, jhogan@...nel.org,
        john@...ozen.org, ldir@...byshire-bryant.me.uk,
        linux-kernel@...r.kernel.org, linux-mips@...r.kernel.org,
        marc.zyngier@....com, paul.burton@...s.com, ralf@...ux-mips.org,
        stable@...r.kernel.org, tglx@...utronix.de,
        Karl Pálsson <karlp@...ctica.com>
Subject: Re: [PATCH AUTOSEL 4.9 18/25] MIPS: perf: ath79: Fix perfcount IRQ
 assignment

On Thu, Jun 06, 2019 at 11:28:04PM +0200, Petr Štetiar wrote:
> Hi,
> 
> Karl has reported to me today, that he's experiencing weird reboot hang on his
> devices with 4.9.180 kernel and that he has bisected it down to my backported
> patch.
> 
> I would like to kindly ask you for removal of this patch.  This patch should
> be reverted from all stable kernels up to 5.1, because perf counters were not
> broken on those kernels, and this patch won't work on the ath79 legacy IRQ
> code anyway, it needs new irqchip driver which was enabled on ath79 with
> commit 51fa4f8912c0 ("MIPS: ath79: drop legacy IRQ code").

Thanks for the report, I'll go revert this from everywhere.

greg k-h