[SRU] [B/D/E/Unstable/OEM-B/OEM-OSP1-B] [PATCH 0/2] Fix unusable USB hub on Dell TB16 after S3
kleber.souza at canonical.com
Wed Dec 11 09:03:32 UTC 2019
On 2019-12-05 18:05, Kai-Heng Feng wrote:
> BugLink: https://bugs.launchpad.net/bugs/1855312
> Sometimes USB hub on Dell TB16 stop working after S3.
> Attempt to power cycle USB device when a it's stuck at eSS.Disabled
> state, it's basically not recoverable.
> After applying the patch, USB ports and USB ethernet are still working
> after 100 times S3 stress test.
> [Regression Potential]
> Low. This is a last resort attempt, in most cases this code path won't
> be reached.
> Kai-Heng Feng (2):
> UBUNTU: SAUCE: USB: core: Make port power cycle a seperate helper
> UBUNTU: SAUCE: USB: core: Attempt power cycle port when it's in
> eSS.Disabled state
> drivers/usb/core/hub.c | 46 +++++++++++++++++++++++++++++++++++------
> drivers/usb/core/hub.h | 3 +--
> drivers/usb/core/port.c | 4 ++--
> 3 files changed, 43 insertions(+), 10 deletions(-)
The fix is targeted to Unstable so I assume this affects mainline as
well. Are we going to try to upstream this fix?
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