On Fri, Dec 10, 2021 at 01:16:53PM +0200, Mathias Nyman wrote: > During disconnect USB-3 ports often go via SS.Inactive link error state > before the missing terminations are noticed, and link finally goes to > RxDetect state > > Avoid immediately warm-resetting ports in SS.Inactive state. > Let ports settle for a while and re-read the link status a few times 20ms > apart to see if the ports transitions out of SS.Inactive. > > According to USB 3.x spec 7.5.2, a port in SS.Inactive should > automatically check for missing far-end receiver termination every > 12 ms (SSInactiveQuietTimeout) > > The futile multiple warm reset retries of a disconnected device takes > a lot of time, also the resetting of a removed devices has caused cases > where the reset bit got stuck for a long time on xHCI roothub. > This lead to issues in detecting new devices connected to the same port > shortly after. > > Tested-by: Mark Pearson <markpearson@xxxxxxxxxx> > Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx> > --- > drivers/usb/core/hub.c | 24 +++++++++++++++++++----- > 1 file changed, 19 insertions(+), 5 deletions(-) Does this fix a specific commit, or has it always been this way? And is this for 5.16-final or 5.17-rc1 and/or stable trees? thanks, greg k-h
