Public bug reported:
[ Impact ]
On certain USB3 device topologies, the hub will enter runtime resume
before the down stream device to wake up. When a device is connect to
such hub, the hub will enter runtime resume before the device generates
any activities, making it not able to get detected.
[ Fix ]
Cherry-pick the following commit:
1. [PATCH v2] usb: hub: fix detection of high tier USB3 devices
behind suspended hubs[1]
[ Test ]
1. Connect SD25TB5/WD25TB5 dock to SUT.
2. Connect USB3.0/3.1 sotarge to dock's USB port.
3. The USB storage should be recognized.
[ Where problems could occurs ]
This may increase resume latency for deeper USB device hierarchy.
[ Additional Information ]
[1] https://lore.kernel.org/linux-
usb/[email protected]/
** Affects: hwe-next
Importance: Undecided
Status: New
** Affects: linux-oem-6.14 (Ubuntu)
Importance: Undecided
Assignee: Leo Lin (0xff07)
Status: New
** Affects: linux-oem-6.14 (Ubuntu Noble)
Importance: Undecided
Assignee: Leo Lin (0xff07)
Status: New
** Tags: jira-wtn-261 oem-priority
** Also affects: linux-oem-6.14 (Ubuntu Noble)
Importance: Undecided
Status: New
** Changed in: linux-oem-6.14 (Ubuntu)
Assignee: (unassigned) => Leo Lin (0xff07)
** Changed in: linux-oem-6.14 (Ubuntu Noble)
Assignee: (unassigned) => Leo Lin (0xff07)
** Tags added: jira-wtn-261 oem-priority
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https://bugs.launchpad.net/bugs/2115478
Title:
[SRU] Add waiting latency for USB port resume
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