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From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH] caif: Add CAIF HSI Link Layer
Date: Sun, 10 Apr 2011 18:49:37 -0700 (PDT)
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=46rom: Sjur Br=E6ndeland <sjur.brandeland@stericsson.com>
Date: Thu,  7 Apr 2011 11:57:42 +0200

> +static int cfhsi_tx_frm(struct cfhsi_desc *desc, struct cfhsi *cfhsi=
)

I do not see what kind of locking prevents multiple threads of control
from entering this function at the same time, making your skb_peek()
sequences illegal.