Re: [PATCH] thunderbolt: Prevent root port runtime suspend during NVM upgrade

Mika Westerberg
2018-11-15T10:35:56Z

On Wed, Nov 07, 2018 at 02:17:14PM +0300, Mika Westerberg wrote:
> During NVM upgrade process the host router is hot-removed for a short
> while. During this time it is possible that the root port is moved into
> D3cold which would be fine if the root port could trigger PME on itself.
> However, many systems actually do not implement it so what happens is
> that the root port goes into D3cold and never wakes up unless userspace
> does PCI config space access, such as running 'lscpi'.
>
> For this reason we explicitly prevent the root port from runtime
> suspending during NVM upgrade.
>
> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>

Applied to thunderbolt.git/fixes.