xhci: prevent endpoint recovery after roothub disconnect

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Prevent transfer retry and endpoint recovery if the device or its parent
disconnected from the roothub. Just like link error case.

There is a suspicion some xHC controllers may stop processing endpoint
related commands after the last USB device disconnects from the host.

Disconnect often causes transaction errors, xhci driver tries to (soft)
reset and restart the endpoint to recover it.
Hub driver again will cancel all pending URBs once disconnect is detected,
stopping the endpoint right after (soft) reset restarted it.
xHC controller sometimes fail to complete the stop endpoint command,
leading to driver timing out, and tearing down xhci

Prevent extra endpoint (soft) reset after xhci driver is aware of the
parent roothub port disconnect.

Tested-by: Xu Rao <raoxu@uniontech.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://patch.msgid.link/20260806142113.2436238-5-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Mathias Nyman 2026-08-06 17:21:00 +03:00 • committed by Greg Kroah-Hartman

parent e3d757dc92

commit 042aad8d0d

2 changed files with 9 additions and 4 deletions

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12

drivers/usb/host/xhci-ring.c

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1

drivers/usb/host/xhci.h

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