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From: Lukas Wunner <lukas@wunner.de>
To: lirongqing <lirongqing@baidu.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>,
	Niklas Schnelle <schnelle@linux.ibm.com>,
	Farhan Ali <alifm@linux.ibm.com>,
	Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>,
	Frank Li <Frank.Li@nxp.com>,
	linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] PCI: Save the Root Port state before a platform-specific reset
Date: Tue, 10 Nov 2026 11:16:14 +0100	[thread overview]
Message-ID: <avLu7sdyMGhig7_5@wunner.de> (raw)
In-Reply-To: <20261110053348.2419-2-lirongqing@baidu.com>

On Tue, Nov 10, 2026 at 01:33:48PM +0800, lirongqing wrote:
> pcibios_reset_secondary_bus() restores the Root Port after
> host->reset_root_port() without ever saving it. pci_bus_reset() only locks
> the devices below the bridge, so the bridge itself is not in the saved set
> either. Save the Root Port before the platform reset.

The state is saved on enumeration in pci_bus_add_device(),
see commit a2f1e22390ac.  Please explain why that is not
sufficient for you.

Thanks,

Lukas

  reply	other threads:[~2026-11-10 10:16 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-11-10  5:33 [PATCH] PCI: Only restore state that was successfully saved around a reset lirongqing
2026-11-10  5:33 ` [PATCH] PCI: Save the Root Port state before a platform-specific reset lirongqing
2026-11-10 10:16   ` Lukas Wunner [this message]
2026-11-10 10:13 ` [PATCH] PCI: Only restore state that was successfully saved around a reset Lukas Wunner

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