[PATCH v2 1/2] can: dev: can_put_echo_skb(): use dev_kfree_skb_any()

[Cunhao Lu]

can_put_echo_skb() is a public helper used by CAN drivers, so its callers
do not have a guaranteed IRQ context.  kfree_skb() cannot be called from
hardware interrupt context or with hardware interrupts disabled.

Use dev_kfree_skb_any() for the existing skb drop paths so that they are
safe regardless of the caller's IRQ context.

Signed-off-by: Cunhao Lu <1579567540@xxxxxx>
---
 drivers/net/can/dev/skb.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/can/dev/skb.c b/drivers/net/can/dev/skb.c
index 95fcdc1026f8..d7b5a5d17ff2 100644
--- a/drivers/net/can/dev/skb.c
+++ b/drivers/net/can/dev/skb.c
@@ -62,7 +62,7 @@ int can_put_echo_skb(struct sk_buff *skb, struct net_device *dev,
 	    (skb->protocol != htons(ETH_P_CAN) &&
 	     skb->protocol != htons(ETH_P_CANFD) &&
 	     skb->protocol != htons(ETH_P_CANXL))) {
-		kfree_skb(skb);
+		dev_kfree_skb_any(skb);
 		return 0;
 	}
 
@@ -90,7 +90,7 @@ int can_put_echo_skb(struct sk_buff *skb, struct net_device *dev,
 	} else {
 		/* locking problem with netif_stop_queue() ?? */
 		netdev_err(dev, "%s: BUG! echo_skb %d is occupied!\n", __func__, idx);
-		kfree_skb(skb);
+		dev_kfree_skb_any(skb);
 		return -EBUSY;
 	}
 

-- 
2.34.1