efi/runtime-wrappers: retire the worker if a wedged call ever returns

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When __efi_queue_work() times out it disables runtime services and
returns, but the kworker is still blocked inside firmware. If the
firmware eventually unblocks, efi_call_rts() would run its tail on an
efi_rts_work that the timed-out caller has long abandoned: signalling a
stale completion and clearing efi_runtime_lock_owner that may by then
belong to another caller.

If runtime services have been disabled by the time the call returns,
park the worker with efi_rts_park_worker() instead, so it never touches
efi_rts_work again or returns to the workqueue.

Suggested-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

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Breno Leitao 2026-06-16 05:09:40 -07:00 • committed by Ard Biesheuvel

parent bb50e70f4f

commit 4b2c033b5b

1 changed files with 3 additions and 0 deletions

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drivers/firmware/efi/runtime-wrappers.c

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