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Subject: Re: [PATCH 14/16] pciehp: Ignore link events during DPC event
To: Keith Busch <keith.busch@intel.com>,
        Linux PCI <linux-pci@vger.kernel.org>,
        Bjorn Helgaas <bhelgaas@google.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Thomas Tai <thomas.tai@oracle.com>, poza@codeaurora.org,
        Lukas Wunner <lukas@wunner.de>
References: <20180831212639.10196-1-keith.busch@intel.com>
 <20180831212639.10196-15-keith.busch@intel.com>
From: Sinan Kaya <okaya@kernel.org>
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Date: Fri, 31 Aug 2018 15:18:15 -0700
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On 8/31/2018 2:26 PM, Keith Busch wrote:
> This is safe because the pciehp and DPC drivers share the same
> interrupt. The DPC driver sets the bus state in the top-half interrupt
> context, and the pciehp driver checks and masks off link events in its
> bottom-half error handler.

Where is this coming from? Is there a spec reference?

DPC and HP interrupts can be implemented as MSI-x interrupts and could
be unrelated interrupt IDs?