serial: fix TIOCMIWAIT race

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The task state must be updated before checking the wakeup condition to
avoid missing a racing modem status update.

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Reported-by: sashiko-bot@kernel.org
Link: https://lore.kernel.org/r/20260904115542.E20D11F00A3D@smtp.kernel.org
Cc: stable@kernel.org
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20260910130816.642699-4-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Johan Hovold 2026-09-10 15:08:15 +02:00 • committed by Greg Kroah-Hartman

parent 8ca59f7bae

commit 40adffec8c

1 changed files with 2 additions and 2 deletions

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drivers/tty/serial/serial_core.c

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