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From: Linus Walleij <linus.walleij@linaro.org>
To: Sungbo Eo <mans0n@gorani.run>
Cc: linux-oxnas@groups.io, Thomas Gleixner <tglx@linutronix.de>,
	Jason Cooper <jason@lakedaemon.net>,
	Marc Zyngier <maz@kernel.org>,
	Linux ARM <linux-arm-kernel@lists.infradead.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Neil Armstrong <narmstrong@baylibre.com>,
	Daniel Golle <daniel@makrotopia.org>
Subject: Re: [PATCH] irqchip/versatile-fpga: Apply clear-mask earlier
Date: Sun, 22 Mar 2020 12:45:29 +0100	[thread overview]
Message-ID: <CACRpkdYvoVF_q1Re_v_sJCYVDOhte0NpdU91UtYB2SpHH60-jg@mail.gmail.com> (raw)
In-Reply-To: <20200321133842.2408823-1-mans0n@gorani.run>

On Sat, Mar 21, 2020 at 2:40 PM Sungbo Eo <mans0n@gorani.run> wrote:

> Clear its own IRQs before the parent IRQ get enabled, so that the
> remaining IRQs do not accidentally interrupt the parent IRQ controller.
>
> This patch also fixes a reboot bug on OX820 SoC, where the remaining
> rps-timer IRQ raises a GIC interrupt that is left pending. After that,
> the rps-timer IRQ is cleared during driver initialization, and there's
> no IRQ left in rps-irq when local_irq_enable() is called, which evokes
> an error message "unexpected IRQ trap".
>
> Fixes: bdd272cbb97a ("irqchip: versatile FPGA: support cascaded interrupts from DT")
> Signed-off-by: Sungbo Eo <mans0n@gorani.run>
> Cc: Neil Armstrong <narmstrong@baylibre.com>
> Cc: Daniel Golle <daniel@makrotopia.org>

Good catch!
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Marc: Cc stable?

Yours,
Linus Walleij

WARNING: multiple messages have this Message-ID (diff)
From: Linus Walleij <linus.walleij@linaro.org>
To: Sungbo Eo <mans0n@gorani.run>
Cc: Jason Cooper <jason@lakedaemon.net>,
	Neil Armstrong <narmstrong@baylibre.com>,
	Marc Zyngier <maz@kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Daniel Golle <daniel@makrotopia.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	linux-oxnas@groups.io,
	Linux ARM <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH] irqchip/versatile-fpga: Apply clear-mask earlier
Date: Sun, 22 Mar 2020 12:45:29 +0100	[thread overview]
Message-ID: <CACRpkdYvoVF_q1Re_v_sJCYVDOhte0NpdU91UtYB2SpHH60-jg@mail.gmail.com> (raw)
In-Reply-To: <20200321133842.2408823-1-mans0n@gorani.run>

On Sat, Mar 21, 2020 at 2:40 PM Sungbo Eo <mans0n@gorani.run> wrote:

> Clear its own IRQs before the parent IRQ get enabled, so that the
> remaining IRQs do not accidentally interrupt the parent IRQ controller.
>
> This patch also fixes a reboot bug on OX820 SoC, where the remaining
> rps-timer IRQ raises a GIC interrupt that is left pending. After that,
> the rps-timer IRQ is cleared during driver initialization, and there's
> no IRQ left in rps-irq when local_irq_enable() is called, which evokes
> an error message "unexpected IRQ trap".
>
> Fixes: bdd272cbb97a ("irqchip: versatile FPGA: support cascaded interrupts from DT")
> Signed-off-by: Sungbo Eo <mans0n@gorani.run>
> Cc: Neil Armstrong <narmstrong@baylibre.com>
> Cc: Daniel Golle <daniel@makrotopia.org>

Good catch!
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Marc: Cc stable?

Yours,
Linus Walleij

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2020-03-22 11:45 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-21 13:38 [PATCH] irqchip/versatile-fpga: Apply clear-mask earlier Sungbo Eo
2020-03-21 13:38 ` Sungbo Eo
2020-03-21 14:05 ` Marc Zyngier
2020-03-21 14:05   ` Marc Zyngier
2020-03-22 11:45 ` Linus Walleij [this message]
2020-03-22 11:45   ` Linus Walleij
2020-03-22 11:51   ` Marc Zyngier
2020-03-22 11:51     ` Marc Zyngier
2020-03-29 20:26 ` [tip: irq/core] " tip-bot2 for Sungbo Eo

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