From: <Alex_Gagniuc@Dellteam.com>
To: <oohall@gmail.com>
Cc: <lukas@wunner.de>, <mr.nuke.me@gmail.com>, <bhelgaas@google.com>,
<Austin.Bolen@dell.com>, <keith.busch@intel.com>,
<Shyam.Iyer@dell.com>, <okaya@kernel.org>,
<linux-pci@vger.kernel.org>, <mika.westerberg@linux.intel.com>,
<okaya@codeaurora.org>, <poza@codeaurora.org>,
<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH RFC v2 4/4] PCI: hotplug: Add quirk For Dell nvme pcie switches
Date: Fri, 22 Feb 2019 19:19:10 +0000 [thread overview]
Message-ID: <747feb2ef93c4c5e97813232904de829@ausx13mps321.AMER.DELL.COM> (raw)
In-Reply-To: <CAOSf1CGqKePUE7Z9R3ojX6Ba_RxsdS7Y2rHONzbZNPNti8MtwQ@mail.gmail.com>
On 2/21/19 8:05 PM, Oliver wrote:
> On Fri, Feb 22, 2019 at 5:38 AM <Alex_Gagniuc@dellteam.com> wrote:
>> On 2/21/19 1:57 AM, Lukas Wunner wrote:
[snip]
>>> If the quirk is x86-specific, please enclose it in "#ifdef CONFIG_X86"
>>> to reduce kernel footprint on other arches.
>>
>> That's a tricky one. If you look at p. 185 of [1], items 9, 11, and 12
>> are standard x16 cards that would fit in any x16 slot. Those cards have
>> the offending switches.
>>
>> On the one hand, you could take the cards and backplane and put them in
>> a non-hax86 system. On the other hand, I don't see why someone would
>> want to do this.
>
> I have a couple of POWER boxes with Dell branded switch cards in them.
> I have no idea why either, but it does happen.
The hardware debouncer, I think, is on the backplane, so you'd really
need both the switch and backplane combo. I've seen other marketing
departments call the switches "NVMe HBA".
Alex
prev parent reply other threads:[~2019-02-22 19:19 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190220012031.10741-1-mr.nuke.me@gmail.com>
2019-02-20 1:20 ` [PATCH RFC v2 1/4] PCI: hotplug: Add support for disabling in-band presence Alexandru Gagniuc
2019-02-21 7:19 ` Lukas Wunner
2019-02-21 18:05 ` Alex_Gagniuc
2019-02-20 1:20 ` [PATCH RFC v2 2/4] PCI: pciehp: Do not turn off slot if presence comes up after link Alexandru Gagniuc
2019-02-21 7:36 ` Lukas Wunner
2019-02-22 19:56 ` Alex_Gagniuc
2019-02-23 6:49 ` Lukas Wunner
2019-02-24 22:27 ` Alex_Gagniuc
2019-02-20 1:20 ` [PATCH RFC v2 3/4] PCI: hotplug: Wait for PDS when in-band presence is disabled Alexandru Gagniuc
2019-02-20 1:20 ` [PATCH RFC v2 4/4] PCI: hotplug: Add quirk For Dell nvme pcie switches Alexandru Gagniuc
2019-02-21 7:56 ` Lukas Wunner
2019-02-21 18:35 ` Alex_Gagniuc
2019-02-22 1:20 ` Joe Perches
2019-02-22 2:04 ` Oliver
2019-02-22 19:19 ` Alex_Gagniuc [this message]
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