[PATCH 3.14 16/42] gianfar: Carefully free skbs in functions called by netpoll.

From: Greg Kroah-Hartman
Date: Sun Apr 26 2015 - 10:06:20 EST

3.14-stable review patch. If anyone has any objections, please let me know.


From: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>

netpoll can call functions in hard irq context that are ordinarily
called in lesser contexts. For those functions use dev_kfree_skb_any
and dev_consume_skb_any so skbs are freed safely from hard irq

Signed-off-by: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
drivers/net/ethernet/freescale/gianfar.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/net/ethernet/freescale/gianfar.c
+++ b/drivers/net/ethernet/freescale/gianfar.c
@@ -2152,13 +2152,13 @@ static int gfar_start_xmit(struct sk_buf
skb_new = skb_realloc_headroom(skb, fcb_len);
if (!skb_new) {
- kfree_skb(skb);
+ dev_kfree_skb_any(skb);
return NETDEV_TX_OK;

if (skb->sk)
skb_set_owner_w(skb_new, skb->sk);
- consume_skb(skb);
+ dev_consume_skb_any(skb);
skb = skb_new;

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