From: Hans Verkuil <hverkuil-cisco@xs4all.nl> stable inclusion from stable-v6.6.2 commit 2b9cecf001026ed6b3a67339777cfbb519b6e239 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8IW7G Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- [ Upstream commit f31b2cb85f0ee165d78e1c43f6d69f82cc3b2145 ] Instead of returning an error, goto the mutex unlock at the end of the function. Fixes smatch warning: drivers/media/usb/dvb-usb-v2/af9035.c:467 af9035_i2c_master_xfer() warn: inconsistent returns '&d->i2c_mutex'. Locked on : 326,387 Unlocked on: 465,467 Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Fixes: 7bf744f2de0a ("media: dvb-usb-v2: af9035: Fix null-ptr-deref in af9035_i2c_master_xfer") Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> --- drivers/media/usb/dvb-usb-v2/af9035.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/drivers/media/usb/dvb-usb-v2/af9035.c b/drivers/media/usb/dvb-usb-v2/af9035.c index 33a2aa8907e6..4eb7dd4599b7 100644 --- a/drivers/media/usb/dvb-usb-v2/af9035.c +++ b/drivers/media/usb/dvb-usb-v2/af9035.c @@ -322,8 +322,10 @@ static int af9035_i2c_master_xfer(struct i2c_adapter *adap, ret = -EOPNOTSUPP; } else if ((msg[0].addr == state->af9033_i2c_addr[0]) || (msg[0].addr == state->af9033_i2c_addr[1])) { - if (msg[0].len < 3 || msg[1].len < 1) - return -EOPNOTSUPP; + if (msg[0].len < 3 || msg[1].len < 1) { + ret = -EOPNOTSUPP; + goto unlock; + } /* demod access via firmware interface */ u32 reg = msg[0].buf[0] << 16 | msg[0].buf[1] << 8 | msg[0].buf[2]; @@ -383,8 +385,10 @@ static int af9035_i2c_master_xfer(struct i2c_adapter *adap, ret = -EOPNOTSUPP; } else if ((msg[0].addr == state->af9033_i2c_addr[0]) || (msg[0].addr == state->af9033_i2c_addr[1])) { - if (msg[0].len < 3) - return -EOPNOTSUPP; + if (msg[0].len < 3) { + ret = -EOPNOTSUPP; + goto unlock; + } /* demod access via firmware interface */ u32 reg = msg[0].buf[0] << 16 | msg[0].buf[1] << 8 | msg[0].buf[2]; @@ -459,6 +463,7 @@ static int af9035_i2c_master_xfer(struct i2c_adapter *adap, ret = -EOPNOTSUPP; } +unlock: mutex_unlock(&d->i2c_mutex); if (ret < 0) -- 2.25.1