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From: Lukas Wunner <lukas@wunner.de>
To: Wu Zongyong <wuzongyong@linux.alibaba.com>
Cc: sdonthineni@nvidia.com, bhelgaas@google.com,
	linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
	wllenyj@linux.alibaba.com, wutu.xq2@linux.alibaba.com,
	gerry@linux.alibaba.com
Subject: Re: [RFC PATCH] PCI: avoid SBR for NVIDIA T4
Date: Thu, 30 Mar 2023 04:41:12 +0200	[thread overview]
Message-ID: <20230330024112.GA27387@wunner.de> (raw)
In-Reply-To: <388bc353a5f88edb502ec04c0dc53ab62a526020.1680090885.git.wuzongyong@linux.alibaba.com>

On Wed, Mar 29, 2023 at 07:58:45PM +0800, Wu Zongyong wrote:
> Secondary bus reset will fail if NVIDIA T4 card is direct attached to a
> root port.
> So avoid to do bus reset,  pci_parent_bus_reset() works nomarlly.

If you cherry-pick commits

  8ef0217227b4 ("PCI/PM: Observe reset delay irrespective of bridge_d3")
  ac91e6980563 ("PCI: Unify delay handling for reset and resume")

from v6.3-rc1, does the issue still persist?

Thanks,

Lukas

  parent reply	other threads:[~2023-03-30  2:41 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-03-29 11:58 [RFC PATCH] PCI: avoid SBR for NVIDIA T4 Wu Zongyong
2023-03-29 17:05 ` Bjorn Helgaas
2023-03-30  2:10   ` Wu Zongyong
2023-03-30 15:49     ` Bjorn Helgaas
2023-03-31  2:11       ` Wu Zongyong
2023-04-03  4:02         ` Wu Zongyong
2023-03-30  2:41 ` Lukas Wunner [this message]
2023-04-10 12:34 ` [PATCH] PCI: Mark NVIDIA T4 GPUs to avoid bus reset Wu Zongyong
2023-04-26  8:13   ` Wu Zongyong
2023-08-09 23:05   ` Bjorn Helgaas
2023-09-08  2:50     ` Wu Zongyong
2023-09-08  3:40       ` Alex Williamson
2023-09-08 20:11         ` Bjorn Helgaas

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