On Mon, Apr 19, 2021 at 01:11:38AM -0400, Chris Chiu wrote: > Sorry that I didn't make myself clear. I found that if I applied RESET_RESUME > quirk on the problematic hub, the Set-Port-Feature(suspend) timeout error > disappeared. SInce the timeout is not happening for each suspend by default, > I suspect maybe reset-resume take everything back to clean state for the hub > and the Set-Port-Feature(suspend) can be taken care of w/o problems. Okay, that's a good solution for system suspend. > I didn't like RESET_RESUME because runtime PM would not work on the quirked > device. A more interesting question is whether it will work for devices plugged into the hub. Even though the hub won't be runtime suspended, the things attached to it might be. > But if the Set-Port-Feature(suspend) can't be handled and > skipped, I can't > expect the runtime PM to work for all devices connected to the hub either. > Is that right? If what I proposed in the patch can not get better > result than existing > quirk, I think using the RESET_RESUME would be a better option. Any suggestions? Try the RESET_RESUME quirk and see how well it works with runtime suspend. Alan Stern
