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path: root/drivers/net/can/dev.c
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Diffstat (limited to 'drivers/net/can/dev.c')
-rw-r--r--drivers/net/can/dev.c27
1 files changed, 13 insertions, 14 deletions
diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c
index 3b3f88ffab53..c05e4d50d43d 100644
--- a/drivers/net/can/dev.c
+++ b/drivers/net/can/dev.c
@@ -480,8 +480,6 @@ EXPORT_SYMBOL_GPL(can_put_echo_skb);
480struct sk_buff *__can_get_echo_skb(struct net_device *dev, unsigned int idx, u8 *len_ptr) 480struct sk_buff *__can_get_echo_skb(struct net_device *dev, unsigned int idx, u8 *len_ptr)
481{ 481{
482 struct can_priv *priv = netdev_priv(dev); 482 struct can_priv *priv = netdev_priv(dev);
483 struct sk_buff *skb = priv->echo_skb[idx];
484 struct canfd_frame *cf;
485 483
486 if (idx >= priv->echo_skb_max) { 484 if (idx >= priv->echo_skb_max) {
487 netdev_err(dev, "%s: BUG! Trying to access can_priv::echo_skb out of bounds (%u/max %u)\n", 485 netdev_err(dev, "%s: BUG! Trying to access can_priv::echo_skb out of bounds (%u/max %u)\n",
@@ -489,20 +487,21 @@ struct sk_buff *__can_get_echo_skb(struct net_device *dev, unsigned int idx, u8
489 return NULL; 487 return NULL;
490 } 488 }
491 489
492 if (!skb) { 490 if (priv->echo_skb[idx]) {
493 netdev_err(dev, "%s: BUG! Trying to echo non existing skb: can_priv::echo_skb[%u]\n", 491 /* Using "struct canfd_frame::len" for the frame
494 __func__, idx); 492 * length is supported on both CAN and CANFD frames.
495 return NULL; 493 */
496 } 494 struct sk_buff *skb = priv->echo_skb[idx];
495 struct canfd_frame *cf = (struct canfd_frame *)skb->data;
496 u8 len = cf->len;
497 497
498 /* Using "struct canfd_frame::len" for the frame 498 *len_ptr = len;
499 * length is supported on both CAN and CANFD frames. 499 priv->echo_skb[idx] = NULL;
500 */
501 cf = (struct canfd_frame *)skb->data;
502 *len_ptr = cf->len;
503 priv->echo_skb[idx] = NULL;
504 500
505 return skb; 501 return skb;
502 }
503
504 return NULL;
506} 505}
507 506
508/* 507/*