diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2017-04-28 09:53:31 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-06-24 15:41:57 -0300 |
| commit | 66083b49bd337e5f4dfa168c145ca38f8bcbe522 (patch) | |
| tree | 7b92b41af1d286d7f81bbde07baabd6bd3430b7c /drivers/media | |
| parent | d18a6ef59c53022b4af222412dc494cfd21c298e (diff) | |
media: dib0700: fix error handling in dib0700_i2c_xfer_legacy()
Mostly this adds some unlocks to error paths. But, if you see where
there were "break;" statements before, I changed those paths to return
error codes instead of returning success.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/usb/dvb-usb/dib0700_core.c | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/drivers/media/usb/dvb-usb/dib0700_core.c b/drivers/media/usb/dvb-usb/dib0700_core.c index 4dea79718827..bea1b4764a66 100644 --- a/drivers/media/usb/dvb-usb/dib0700_core.c +++ b/drivers/media/usb/dvb-usb/dib0700_core.c @@ -287,7 +287,7 @@ static int dib0700_i2c_xfer_legacy(struct i2c_adapter *adap, { struct dvb_usb_device *d = i2c_get_adapdata(adap); struct dib0700_state *st = d->priv; - int i,len; + int i, len, result; if (mutex_lock_interruptible(&d->i2c_mutex) < 0) return -EINTR; @@ -304,7 +304,8 @@ static int dib0700_i2c_xfer_legacy(struct i2c_adapter *adap, if (msg[i].len > sizeof(st->buf) - 2) { deb_info("i2c xfer to big: %d\n", msg[i].len); - return -EIO; + result = -EIO; + goto unlock; } memcpy(&st->buf[2], msg[i].buf, msg[i].len); @@ -319,13 +320,15 @@ static int dib0700_i2c_xfer_legacy(struct i2c_adapter *adap, if (len <= 0) { deb_info("I2C read failed on address 0x%02x\n", msg[i].addr); - break; + result = -EIO; + goto unlock; } if (msg[i + 1].len > sizeof(st->buf)) { deb_info("i2c xfer buffer to small for %d\n", msg[i].len); - return -EIO; + result = -EIO; + goto unlock; } memcpy(msg[i + 1].buf, st->buf, msg[i + 1].len); @@ -334,14 +337,17 @@ static int dib0700_i2c_xfer_legacy(struct i2c_adapter *adap, i++; } else { st->buf[0] = REQUEST_I2C_WRITE; - if (dib0700_ctrl_wr(d, st->buf, msg[i].len + 2) < 0) - break; + result = dib0700_ctrl_wr(d, st->buf, msg[i].len + 2); + if (result < 0) + goto unlock; } } + result = i; +unlock: mutex_unlock(&d->usb_mutex); mutex_unlock(&d->i2c_mutex); - return i; + return result; } static int dib0700_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msg, |