[PATCH 2/3] PCI: Support asynchronous shutdown

[Bart Van Assche]

On 12/12/23 10:09, Jeremy Allison wrote:
> From: Tanjore Suresh <tansuresh at google.com>
> 
> Enhances the base PCI driver to add support for asynchronous
> shutdown.
> 
> Assume a device takes n secs to shutdown. If a machine has been
> populated with M such devices, the total time spent in shutting down
> all the devices will be M * n secs, if the shutdown is done
> synchronously. For example, if NVMe PCI Controllers take 5 secs
> to shutdown and if there are 16 such NVMe controllers in a system,
> system will spend a total of 80 secs to shutdown all
> NVMe devices in that system.
> 
> In order to speed up the shutdown time, asynchronous interface to
> shutdown has been implemented. This will significantly reduce
> the machine reboot time.
> 
> Signed-off-by: Tanjore Suresh <tansuresh at google.com>
> ---
>   drivers/pci/pci-driver.c | 17 ++++++++++++++---
>   include/linux/pci.h      |  2 ++
>   2 files changed, 16 insertions(+), 3 deletions(-)

Please Cc the PCI maintainer (Bjorn Helgaas) when reposting this patch
series.

Thanks,

Bart.