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Message-ID: <alpine.DEB.2.21.1906261502450.32342@nanos.tec.linutronix.de>
Date: Wed, 26 Jun 2019 15:03:54 +0200 (CEST)
From: Thomas Gleixner <tglx@...utronix.de>
To: LKML <linux-kernel@...r.kernel.org>
cc: x86@...nel.org, Robert Hodaszi <Robert.Hodaszi@...i.com>,
Vadim Pasternak <vadimp@...lanox.com>,
Ido Schimmel <idosch@...lanox.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-serial@...r.kernel.org, Marc Zyngier <marc.zyngier@....com>
Subject: Re: [patch 2/5] genirq: Add optional hardware synchronization for
shutdown
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.
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