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

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Date:   Thu,  6 Jun 2019 23:28:04 +0200
From:   Petr Štetiar <ynezz@...e.cz>
To:     sashal@...nel.org
Cc:     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, ynezz@...e.cz,
        Karl Pálsson <karlp@...ctica.com>
Subject: Re: [PATCH AUTOSEL 4.9 18/25] MIPS: perf: ath79: Fix perfcount IRQ assignment

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!

Cheers,

Petr