On Mon, Feb 17, 2020 at 06:28:02PM -0800, Prabhakar Kushwaha wrote:
> device_shutdown() called from reboot or power_shutdown expect
> all devices to be shutdown. Same is true for even ahci pci driver.
> As no ahci shutdown function is implemented, the ata subsystem
> always remains alive with DMA & interrupt support. File system
> related calls should not be honored after device_shutdown().
>
> So defining ahci pci driver shutdown to freeze hardware (mask
> interrupt, stop DMA engine and free DMA resources).
>
> Signed-off-by: Prabhakar Kushwaha <pkushwaha@xxxxxxxxxxx>
> Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
> ---
>
> This problem has also been seen on older kernel. So sending to stable@xxxxxxxxxxxxxxx
> Note: It is already applied to git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> with commit id: 10a663a1b151 ("ata: ahci: Add shutdown to freeze hardware resources of ahci")
So what kernel(s) do you wish to have this commit backported to?
thanks,
greg k-h
