]> git.baikalelectronics.ru Git - kernel.git/commit
tty: n_gsm: fix packet re-transmission without open control channel
authorDaniel Starke <daniel.starke@siemens.com>
Fri, 1 Jul 2022 06:16:50 +0000 (08:16 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 17 Aug 2022 12:24:05 +0000 (14:24 +0200)
commitc2399be9010f6147000370b390ace8a49f851b63
treea05c21d3d500c06a1f0395b11d4e2344f9a92ea8
parent3a9b689034125cb9ec07898a7aeb53f14c81c93c
tty: n_gsm: fix packet re-transmission without open control channel

[ Upstream commit 2f45f991fdd64b5f60573f48b3aa881528ea32e0 ]

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: 99551fa31543 ("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>
drivers/tty/n_gsm.c