netdev - [PATCH net 3/3] mISDN: hfcmulti: don't call dev_kfree_skb() under spin_lock

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Message-ID: <20221207093239.3775457-4-yangyingliang@huawei.com>
Date:   Wed, 7 Dec 2022 17:32:39 +0800
From:   Yang Yingliang <yangyingliang@...wei.com>
To:     <netdev@...r.kernel.org>
CC:     <isdn@...ux-pingi.de>, <davem@...emloft.net>
Subject: [PATCH net 3/3] mISDN: hfcmulti: don't call dev_kfree_skb() under spin_lock_irqsave()

It is not allowed to call consume_skb() from hardware interrupt context
or with interrupts being disabled. So replace dev_kfree_skb() with
dev_consume_skb_irq() under spin_lock_irqsave().

Fixes: af69fb3a8ffa ("Add mISDN HFC multiport driver")
Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
---
 drivers/isdn/hardware/mISDN/hfcmulti.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/isdn/hardware/mISDN/hfcmulti.c b/drivers/isdn/hardware/mISDN/hfcmulti.c
index 4f7eaa17fb27..9f932cbb2a20 100644
--- a/drivers/isdn/hardware/mISDN/hfcmulti.c
+++ b/drivers/isdn/hardware/mISDN/hfcmulti.c
@@ -3266,12 +3266,12 @@ hfcm_l1callback(struct dchannel *dch, u_int cmd)
 		}
 		skb_queue_purge(&dch->squeue);
 		if (dch->tx_skb) {
-			dev_kfree_skb(dch->tx_skb);
+			dev_consume_skb_irq(dch->tx_skb);
 			dch->tx_skb = NULL;
 		}
 		dch->tx_idx = 0;
 		if (dch->rx_skb) {
-			dev_kfree_skb(dch->rx_skb);
+			dev_consume_skb_irq(dch->rx_skb);
 			dch->rx_skb = NULL;
 		}
 		test_and_clear_bit(FLG_TX_BUSY, &dch->Flags);
@@ -3407,12 +3407,12 @@ handle_dmsg(struct mISDNchannel *ch, struct sk_buff *skb)
 			}
 			skb_queue_purge(&dch->squeue);
 			if (dch->tx_skb) {
-				dev_kfree_skb(dch->tx_skb);
+				dev_consume_skb_irq(dch->tx_skb);
 				dch->tx_skb = NULL;
 			}
 			dch->tx_idx = 0;
 			if (dch->rx_skb) {
-				dev_kfree_skb(dch->rx_skb);
+				dev_consume_skb_irq(dch->rx_skb);
 				dch->rx_skb = NULL;
 			}
 			test_and_clear_bit(FLG_TX_BUSY, &dch->Flags);
-- 
2.25.1