tty: n_gsm: fix packet re-transmission without open control channel

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[ Upstream commit 4fae831b3a ]

In the current implementation control packets are re-transmitted even if
the control channel closed down during T2. This is wrong.
Check whether the control channel is open before re-transmitting any
packets. Note that control channel open/close is handled by T1 and not T2
and remains unaffected by this.

Fixes: e1eaea46bb ("tty: n_gsm line discipline")
Signed-off-by: Daniel Starke <daniel.starke@siemens.com>
Link: https://lore.kernel.org/r/20220701061652.39604-7-daniel.starke@siemens.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Daniel Starke 2022-07-01 08:16:50 +02:00 • committed by Greg Kroah-Hartman

parent 2012b064f9

commit 51556905dd

1 changed files with 1 additions and 1 deletions

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drivers/tty/n_gsm.c

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