APPLIED: [PATCH 0/1][F/H] Fix usb hub failure caused by short power-on-good delay

[Kelsey Skunberg]

applied to Focal and Hirsute master-next. Thank you! 

-Kelsey

On 2021-08-12 21:35:11 , Chris Chiu wrote:
> BugLink: https://bugs.launchpad.net/bugs/1939638
> 
> [Impact]
> The USB devices (keyboard, storage...) are failed to be detected when connecting to the problematic root hubs which need longer PowerOn-to-PowerGood delay than it claims in the hub descriptor. It's caused by the upstream fix 90d28fb53d4a ("usb: core: reduce power-on-good delay time of root hub").
> 
> [Fix]
> Reverting the upstream fix until a formal fix been placed.
> 
> [Test Case]
> 1. Plug the USB device to the ports of problematic root hub.
> 2. Power on the machine.
> 3. Check if the USB device can work or not after boot.
> 
> [Regression Potential]
> Low. The longer delay is proven safe in old kernels.
> 
> Chris Chiu (1):
>   Revert "usb: core: reduce power-on-good delay time of root hub"
> 
>  drivers/usb/core/hub.h | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> -- 
> 2.25.1
> 
> 
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