linux-kernel - Re: [PATCH v3] PCI: Prevent power state transition of erroneous device

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Message-ID: <aCHMM7YMqT8onaKl@black.fi.intel.com>
Date: Mon, 12 May 2025 13:23:47 +0300
From: Raag Jadav <raag.jadav@...el.com>
To: rafael@...nel.org, mahesh@...ux.ibm.com, oohall@...il.com,
	bhelgaas@...gle.com
Cc: linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
	ilpo.jarvinen@...ux.intel.com, lukas@...ner.de,
	aravind.iddamsetty@...ux.intel.com
Subject: Re: [PATCH v3] PCI: Prevent power state transition of erroneous
 device

On Sun, May 04, 2025 at 02:34:44PM +0530, Raag Jadav wrote:
> If error flags are set on an AER capable device, most likely either the
> device recovery is in progress or has already failed. Neither of the
> cases are well suited for power state transition of the device, since
> this can lead to unpredictable consequences like resume failure, or in
> worst case the device is lost because of it. Leave the device in its
> existing power state to avoid such issues.
> 
> Signed-off-by: Raag Jadav <raag.jadav@...el.com>
> ---
> 
> v2: Synchronize AER handling with PCI PM (Rafael)
> v3: Move pci_aer_in_progress() to pci_set_low_power_state() (Rafael)
>     Elaborate "why" (Bjorn)
> 
> More discussion on [1].
> [1] https://lore.kernel.org/all/CAJZ5v0g-aJXfVH+Uc=9eRPuW08t-6PwzdyMXsC6FZRKYJtY03Q@mail.gmail.com/

Bump. Anything I can do to move this forward?

Raag