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Date:   Wed, 26 Jun 2019 15:03:54 +0200 (CEST)
From:   Thomas Gleixner <tglx@linutronix.de>
To:     LKML <linux-kernel@vger.kernel.org>
cc:     x86@kernel.org, Robert Hodaszi <Robert.Hodaszi@digi.com>,
        Vadim Pasternak <vadimp@mellanox.com>,
        Ido Schimmel <idosch@mellanox.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        linux-serial@vger.kernel.org, Marc Zyngier <marc.zyngier@arm.com>
Subject: Re: [patch 2/5] genirq: Add optional hardware synchronization for
 shutdown
In-Reply-To: <20190625112405.666964552@linutronix.de>
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References: <20190625111353.863718167@linutronix.de> <20190625112405.666964552@linutronix.de>
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On Tue, 25 Jun 2019, Thomas Gleixner wrote:
>   *	Returns: false if a threaded handler is active.
>   *
>   *	This function may be called - with care - from IRQ context.
> + *
> + *	It does not check whether there is an interrupt on flight at the
> + *	hardware level, but not serviced yet, as this might deadlock.

  + when invoked from an interrupt disabled region.