diff options
| author | Yuanjun Gong <ruc_gongyuanjun@163.com> | 2023-07-25 06:35:13 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@kernel.org> | 2023-08-10 08:58:36 +0300 |
| commit | 7b7a3c014ed6bda5c37f7a95ad684796dc26c9a5 (patch) | |
| tree | f2c420d04682c80ba40636f15a9aa2f4d34bbec2 /drivers/media | |
| parent | 992ba89d0300d943811e996c6fd36d6979dcf273 (diff) | |
| download | linux-7b7a3c014ed6bda5c37f7a95ad684796dc26c9a5.tar.xz | |
media: dvb: mb86a16: check the return value of mb86a16_read()
return an error code if mb86a16_read() gets an unexpected return
value.
Signed-off-by: Yuanjun Gong <ruc_gongyuanjun@163.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
[hverkuil: add {} around the else statement]
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/dvb-frontends/mb86a16.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/media/dvb-frontends/mb86a16.c b/drivers/media/dvb-frontends/mb86a16.c index d3e29937cf4c..3ec2cb4fa504 100644 --- a/drivers/media/dvb-frontends/mb86a16.c +++ b/drivers/media/dvb-frontends/mb86a16.c @@ -1487,10 +1487,12 @@ static int mb86a16_set_fe(struct mb86a16_state *state) } } - mb86a16_read(state, 0x15, &agcval); - mb86a16_read(state, 0x26, &cnmval); - dprintk(verbose, MB86A16_INFO, 1, "AGC = %02x CNM = %02x", agcval, cnmval); - + if (mb86a16_read(state, 0x15, &agcval) != 2 || mb86a16_read(state, 0x26, &cnmval) != 2) { + dprintk(verbose, MB86A16_ERROR, 1, "I2C transfer error"); + ret = -EREMOTEIO; + } else { + dprintk(verbose, MB86A16_INFO, 1, "AGC = %02x CNM = %02x", agcval, cnmval); + } return ret; } |