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authorDan Carpenter <dan.carpenter@oracle.com>2017-04-28 15:53:31 +0300
committerMauro Carvalho Chehab <mchehab@s-opensource.com>2017-06-24 21:41:57 +0300
commit66083b49bd337e5f4dfa168c145ca38f8bcbe522 (patch)
tree7b92b41af1d286d7f81bbde07baabd6bd3430b7c /drivers/media/usb/dvb-usb
parentd18a6ef59c53022b4af222412dc494cfd21c298e (diff)
downloadlinux-66083b49bd337e5f4dfa168c145ca38f8bcbe522.tar.xz
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/usb/dvb-usb')
-rw-r--r--drivers/media/usb/dvb-usb/dib0700_core.c20
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,