media: cec: cec-adap: always cancel work in cec_transmit_msg_fh

stable inclusion
from stable-v4.19.316
commit 896dfd4d74f84c854d3a24d889e54a44329d313e
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I8YC89
CVE: CVE-2024-23848

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=896dfd4d74f84c854d3a24d889e54a44329d313e



--------------------------------

[ Upstream commit 9fe2816816a3c765dff3b88af5b5c3d9bbb911ce ]

Do not check for !data->completed, just always call
cancel_delayed_work_sync(). This fixes a small race condition.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reported-by: Yang, Chenyuan <cy54@illinois.edu>
Closes: https://lore.kernel.org/linux-media/PH7PR11MB57688E64ADE4FE82E658D86DA09EA@PH7PR11MB5768.namprd11.prod.outlook.com/


Fixes: 490d84f6 ("media: cec: forgot to cancel delayed work")
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Yongqiang Liu <liuyongqiang13@huawei.com>