diff options
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/can/dev.c | 29 |
1 files changed, 15 insertions, 14 deletions
diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c index de04eac..e5f1faf 100644 --- a/drivers/net/can/dev.c +++ b/drivers/net/can/dev.c @@ -260,20 +260,23 @@ static int can_get_bittiming(struct net_device *dev, struct can_bittiming *bt) int err; /* Check if the CAN device has bit-timing parameters */ - if (priv->bittiming_const) { + if (!priv->bittiming_const) + return 0; - /* Non-expert mode? Check if the bitrate has been pre-defined */ - if (!bt->tq) - /* Determine bit-timing parameters */ - err = can_calc_bittiming(dev, bt); - else - /* Check bit-timing params and calculate proper brp */ - err = can_fixup_bittiming(dev, bt); - if (err) - return err; - } + /* + * Depending on the given can_bittiming parameter structure the CAN + * timing parameters are calculated based on the provided bitrate OR + * alternatively the CAN timing parameters (tq, prop_seg, etc.) are + * provided directly which are then checked and fixed up. + */ + if (!bt->tq && bt->bitrate) + err = can_calc_bittiming(dev, bt); + else if (bt->tq && !bt->bitrate) + err = can_fixup_bittiming(dev, bt); + else + err = -EINVAL; - return 0; + return err; } /* @@ -667,8 +670,6 @@ static int can_changelink(struct net_device *dev, if (dev->flags & IFF_UP) return -EBUSY; memcpy(&bt, nla_data(data[IFLA_CAN_BITTIMING]), sizeof(bt)); - if ((!bt.bitrate && !bt.tq) || (bt.bitrate && bt.tq)) - return -EINVAL; err = can_get_bittiming(dev, &bt); if (err) return err; |