linux-kernel - Re: [PATCH NEXT 6/6] PCI/PORTDRV: Remove ERR_FATAL handling from pcie_portdrv_slot

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Message-ID: <20180608224330.GA25132@localhost.localdomain>
Date:   Fri, 8 Jun 2018 16:43:30 -0600
From:   Keith Busch <keith.busch@...el.com>
To:     "poza@...eaurora.org" <poza@...eaurora.org>
Cc:     Bjorn Helgaas <helgaas@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Philippe Ombredanne <pombredanne@...b.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Dongdong Liu <liudongdong3@...wei.com>,
        Wei Zhang <wzhang@...com>, Sinan Kaya <okaya@...eaurora.org>,
        Timur Tabi <timur@...eaurora.org>
Subject: Re: [PATCH NEXT 6/6] PCI/PORTDRV: Remove ERR_FATAL handling from
 pcie_portdrv_slot_reset()

On Thu, Jun 07, 2018 at 09:47:42PM -0700, poza@...eaurora.org wrote:
> Keith,
> 
> do you know why in ERR_FATAL case following was done ?
> have a look at pcie_portdrv_slot_reset() handling (for bridges, switches 
> etc..)

Not sure, but I was looking into some issues in this area anyway.

I'm finding that non-hotpluggable bridges that support D3 are getting
put into that low-power mode, and that pretty much breaks the
re-enumeration.