[PATCH v2 0/1][SRU][OEM-OSP1-B] UBUNTU: SAUCE: pci: Speed up the process of s3 resume

[Seth Forshee]

On Mon, May 11, 2020 at 05:00:45PM +0800, koba.ko at canonical.com wrote:
> From: Koba Ko <koba.ko at canonical.com>
> 
> BugLink: https://bugs.launchpad.net/bugs/1876844
> 
> [Impact]
> Process of s3 resume take 7s and it's too long which is over 5s.
> 
> [Fix]
> Reference link_active_reporting field of PCI device to determine whether delay is taken or not.
> Actual delay would be determined by taking maximum between 100ms and pci device's d3cold delay.
> 
> [test]
> With the patch, the total time s3 resume is 3874.298 ms which is smaller than 5s.
> 
> [Regression Potential]
> Medium. This patch only changes the rules to determine whether delay is taken or not.
> Reference the right field(link_active_reporting), but not speed of pci device.
> 
> v2: correct BugLink typo only

Does this problem also exist in the focal 5.4 kernel? Users of OEM
kernels in bionic will be moved to the focal GA kernel on upgrade to
20.04, so if the problem exists there and we fix it in the osp1 kernel
users would see a regrssion. I would expect that any sauce patches
submitted for bionic OEM kernels at this point should either also be
submitted for focal, or else come with an explanation of why the patch
is not required for focal.

Thanks,
Seth