usb: xhci: Avoid Stop Endpoint retry loop if the endpoint seems Running

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[ Upstream commit 28a76fcc4c ]

Nothing prevents a broken HC from claiming that an endpoint is Running
and repeatedly rejecting Stop Endpoint with Context State Error.

Avoid infinite retries and give back cancelled TDs.

No such cases known so far, but HCs have bugs.

Signed-off-by: Michal Pecio <michal.pecio@gmail.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20250311154551.4035726-4-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Michal Pecio 2025-03-11 17:45:51 +02:00 • committed by Greg Kroah-Hartman

parent 2ef4b0e911

commit 9ff59cb815

1 changed files with 7 additions and 4 deletions

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drivers/usb/host/xhci-ring.c

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