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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>
This commit is contained in:
Dan Carpenter 2017-04-28 09:53:31 -03:00 committed by Mauro Carvalho Chehab
parent d18a6ef59c
commit 66083b49bd
1 changed files with 13 additions and 7 deletions
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20
drivers/media/usb/dvb-usb/dib0700_core.c
View File

@ -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,