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Subject: media: dvb-usb-v2: af9035: fix missing unlock
Author: Hans Verkuil <hverkuil-ci...@xs4all.nl>
Date: Fri Oct 6 12:08:45 2023 +0200
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-ci...@xs4all.nl>
Fixes: 7bf744f2de0a ("media: dvb-usb-v2: af9035: Fix null-ptr-deref in
af9035_i2c_master_xfer")
Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
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)
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