linux-kernel - Re: [PATCH V3 1/2] PCI: Try to clean up resources via remove if shutdown doesn't exist

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Message-ID: <0bf8bfe6-370d-8794-d205-f3ff51f23f4c@finnie.org>
Date:   Tue, 29 May 2018 18:49:38 -0700
From:   Ryan Finnie <ryan@...nie.org>
To:     Sinan Kaya <okaya@...eaurora.org>, linux-pci@...r.kernel.org,
        timur@...eaurora.org
Cc:     linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, stable@...r.kernel.org,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V3 1/2] PCI: Try to clean up resources via remove if
 shutdown doesn't exist

On 05/28/2018 02:21 PM, Sinan Kaya wrote:
> It is up to a driver to implement shutdown() callback. If shutdown()
> callback is not implemented, PCI device can have pending interrupt and
> even do DMA transactions while the system is going down.
> 
> If kexec is in use, this can damage the newly booting kexec kernel
> or even prevent it from booting altogether. Fallback to calling the
> remove() callback if shutdown() isn't implemented for a given driver.
> 
> Signed-off-by: Sinan Kaya <okaya@...eaurora.org>
> Link: https://bugzilla.kernel.org/show_bug.cgi?id=199779
> Fixes: cc27b735ad3a ("PCI/portdrv: Turn off PCIe services during shutdown")
> Cc: stable@...r.kernel.org
> Reported-by: Ryan Finnie <ryan@...nie.org>

Tested successfully on DL360 Gen9 and DL380 Gen9.

Tested-by: Ryan Finnie <ryan@...nie.org>