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brcmfmac: Fix crash on cleanup.

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When driver gets unloaded due to error situation there is a chance
a packet gets received while fws has already been cleaned up. This
will result in kernel crash. This patch adds a check to avoid this
crash.

Reviewed-by: Arend Van Spriel <arend@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Hante Meuleman <meuleman@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Hante Meuleman 2014-09-30 10:23:17 +02:00 committed by John W. Linville
parent f48556e1b6
commit 58b2251e96
1 changed files with 1 additions and 1 deletions
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2
drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c
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@ -1636,7 +1636,7 @@ int brcmf_fws_hdrpull(struct brcmf_pub *drvr, int ifidx, s16 signal_len,
if (!signal_len)
return 0;
/* if flow control disabled, skip to packet data and leave */
if (!fws->fw_signals) {
if ((!fws) || (!fws->fw_signals)) {
skb_pull(skb, signal_len);
return 0;
}