[PATCH 5.15 336/731] net: amd: lance: dont call dev_kfree_skb() under spin_lock_irqsave()

Greg Kroah-Hartman
2022-12-28T15:12:02Z

From: Yang Yingliang <yangyingliang@huawei.com>

[ Upstream commit 6151d105dfce8c23edf30eed35e97f3d9b96a35c ]

It is not allowed to call kfree_skb() or consume_skb() from hardware
interrupt context or with hardware interrupts being disabled.

It should use dev_kfree_skb_irq() or dev_consume_skb_irq() instead.
The difference between them is free reason, dev_kfree_skb_irq() means
the SKB is dropped in error and dev_consume_skb_irq() means the SKB
is consumed in normal.

In these two cases, dev_kfree_skb() is called consume the xmited SKB,
so replace it with dev_consume_skb_irq().

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/amd/atarilance.c | 2 +-
drivers/net/ethernet/amd/lance.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/amd/atarilance.c b/drivers/net/ethernet/amd/atarilance.c
index 9d2f49fd945e..a0971ed00453 100644
--- a/drivers/net/ethernet/amd/atarilance.c
+++ b/drivers/net/ethernet/amd/atarilance.c
@@ -821,7 +821,7 @@ lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
lp->memcpy_f( PKTBUF_ADDR(head), (void *)skb->data, skb->len );
head->flag = TMD1_OWN_CHIP | TMD1_ENP | TMD1_STP;
dev->stats.tx_bytes += skb->len;
- dev_kfree_skb( skb );
+ dev_consume_skb_irq(skb);
lp->cur_tx++;
while( lp->cur_tx >= TX_RING_SIZE && lp->dirty_tx >= TX_RING_SIZE ) {
lp->cur_tx -= TX_RING_SIZE;
diff --git a/drivers/net/ethernet/amd/lance.c b/drivers/net/ethernet/amd/lance.c
index 945bf1d87507..6c2d72024e21 100644
--- a/drivers/net/ethernet/amd/lance.c
+++ b/drivers/net/ethernet/amd/lance.c
@@ -999,7 +999,7 @@ static netdev_tx_t lance_start_xmit(struct sk_buff *skb,
skb_copy_from_linear_data(skb, &lp->tx_bounce_buffs[entry], skb->len);
lp->tx_ring[entry].base =
((u32)isa_virt_to_bus((lp->tx_bounce_buffs + entry)) & 0xffffff) | 0x83000000;
- dev_kfree_skb(skb);
+ dev_consume_skb_irq(skb);
} else {
lp->tx_skbuff[entry] = skb;
lp->tx_ring[entry].base = ((u32)isa_virt_to_bus(skb->data) & 0xffffff) | 0x83000000;
--
2.35.1