It is not allowed to call kfree_skb() from hardware interrupt
context or with hardware interrupts being disabled. All the SKBs have
been dequeued from the old queue, so it's safe to enqueue these
SKBs to a free queue, then free them after spin_unlock_irqrestore()
at once. Compile tested only.
Fixes: 94a799425eee ("From: wlanfae <wlanfae@xxxxxxxxxxx> [PATCH 1/8] rtl8192e: Import new version of driver from realtek")
Signed-off-by: Jinjie Ruan <ruanjinjie@xxxxxxxxxx>
---
v2:
- Update the commit title and subject prefix.
---
drivers/staging/rtl8192e/rtllib_softmac.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/staging/rtl8192e/rtllib_softmac.c b/drivers/staging/rtl8192e/rtllib_softmac.c
index 0e52b207942d..398fb354d342 100644
--- a/drivers/staging/rtl8192e/rtllib_softmac.c
+++ b/drivers/staging/rtl8192e/rtllib_softmac.c
@@ -2353,8 +2353,10 @@ void rtllib_softmac_xmit(struct rtllib_txb *txb, struct rtllib_device *ieee)
unsigned long flags;
int i;
struct cb_desc *tcb_desc = NULL;
+ struct sk_buff_head free_list;
unsigned long queue_len = 0;
+ skb_queue_head_init(&free_list);
spin_lock_irqsave(&ieee->lock, flags);
/* called with 2nd parm 0, no tx mgmt lock required */
@@ -2382,7 +2384,7 @@ void rtllib_softmac_xmit(struct rtllib_txb *txb, struct rtllib_device *ieee)
skb_queue_tail(&ieee->skb_waitQ[queue_index],
txb->fragments[i]);
else
- kfree_skb(txb->fragments[i]);
+ __skb_queue_tail(&free_list, txb->fragments[i]);
} else {
ieee->softmac_data_hard_start_xmit(
txb->fragments[i],
@@ -2393,6 +2395,8 @@ void rtllib_softmac_xmit(struct rtllib_txb *txb, struct rtllib_device *ieee)
rtllib_txb_free(txb);
spin_unlock_irqrestore(&ieee->lock, flags);
+
+ __skb_queue_purge(&free_list);
}
void rtllib_reset_queue(struct rtllib_device *ieee)
--
2.34.1
