From: Vidya Sagar <vidyas@nvidia.com>
To: <rafael.j.wysocki@intel.com>, <keith.busch@intel.com>, <hch@lst.de>
Cc: <bhelgaas@google.com>, <mmaddireddy@nvidia.com>,
<kthota@nvidia.com>, <sagar.tv@gmail.com>,
<linux-pci@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: Query related to shutting down NVMe during system suspend
Date: Tue, 1 Feb 2022 21:52:28 +0530 [thread overview]
Message-ID: <65b836cd-8d5d-b9c2-eb8f-2ee3ef46112b@nvidia.com> (raw)
Hi Rafael & Christoph,
My query is regarding the comment and the code that follows after it at
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/nvme/host/pci.c?h=v5.17-rc2#n3243
What I understood from it is that, there is an underlying assumption
that the power to the devices is not removed during the suspend call.
In the case of device-tree based platforms like Tegra194, power is
indeed removed to the devices during suspend-resume process. Hence, the
NVMe devices need to be taken through the shutdown path irrespective of
whether the ASPM states are enabled or not.
I would like to hear from you the best method to follow to achieve this.
Thanks & Regards,
Vidya Sagar
next reply other threads:[~2022-02-01 16:22 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-01 16:22 Vidya Sagar [this message]
2022-02-01 16:30 ` Query related to shutting down NVMe during system suspend Keith Busch
2022-02-01 16:58 ` Vidya Sagar
2022-02-07 10:57 ` nitirawa
2022-02-07 12:11 ` Vidya Sagar
2022-02-07 15:44 ` nitirawa
2022-02-07 15:47 ` Keith Busch
2022-02-01 17:17 ` Rafael J. Wysocki
2022-02-09 20:26 ` Keith Busch
2022-02-09 21:17 ` nitirawa
2022-02-09 21:47 ` Keith Busch
2022-02-10 4:11 ` Vidya Sagar
2022-02-10 5:40 ` Lukas Wunner
2022-02-10 12:36 ` nitirawa
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