mwifiex: Fix NULL pointer dereference in skb_dequeue()
At couple of places in cleanup path, we are just going through the skb queue and freeing them without unlinking. This leads to a crash when other thread tries to do skb_dequeue() and use already freed node. The problem is freed by unlinking skb before freeing it. Signed-off-by: Amitkumar Karwar <akarwar@marvell.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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