diff options
Diffstat (limited to 'drivers/net/can/dev.c')
| -rw-r--r-- | drivers/net/can/dev.c | 27 |
1 files changed, 13 insertions, 14 deletions
diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c index 1dbee1cb3df9..8b7c6425b681 100644 --- a/drivers/net/can/dev.c +++ b/drivers/net/can/dev.c @@ -426,8 +426,6 @@ EXPORT_SYMBOL_GPL(can_put_echo_skb); struct sk_buff *__can_get_echo_skb(struct net_device *dev, unsigned int idx, u8 *len_ptr) { struct can_priv *priv = netdev_priv(dev); - struct sk_buff *skb = priv->echo_skb[idx]; - struct canfd_frame *cf; if (idx >= priv->echo_skb_max) { netdev_err(dev, "%s: BUG! Trying to access can_priv::echo_skb out of bounds (%u/max %u)\n", @@ -435,20 +433,21 @@ struct sk_buff *__can_get_echo_skb(struct net_device *dev, unsigned int idx, u8 return NULL; } - if (!skb) { - netdev_err(dev, "%s: BUG! Trying to echo non existing skb: can_priv::echo_skb[%u]\n", - __func__, idx); - return NULL; - } + if (priv->echo_skb[idx]) { + /* Using "struct canfd_frame::len" for the frame + * length is supported on both CAN and CANFD frames. + */ + struct sk_buff *skb = priv->echo_skb[idx]; + struct canfd_frame *cf = (struct canfd_frame *)skb->data; + u8 len = cf->len; + + *len_ptr = len; + priv->echo_skb[idx] = NULL; - /* Using "struct canfd_frame::len" for the frame - * length is supported on both CAN and CANFD frames. - */ - cf = (struct canfd_frame *)skb->data; - *len_ptr = cf->len; - priv->echo_skb[idx] = NULL; + return skb; + } - return skb; + return NULL; } /* |