[PATCH 2/4] wifi: brcmfmac: Fix brcmf_pno_detach NULL-pointer deference

[Sean Anderson]

brcmf_pno_attach is called when firmware is loaded, which may not have
happened yet at removal time. Skip the rest of the cleanup if pi is
NULL.

Fixes: efc2c1fa8e14 ("brcmfmac: add support multi-scheduled scan")
Signed-off-by: Sean Anderson <sanderson@xxxxxxxxx>
---

 drivers/net/wireless/broadcom/brcm80211/brcmfmac/pno.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pno.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pno.c
index d9fc94076791d..07d195e4d2832 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pno.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pno.c
@@ -533,6 +533,8 @@ void brcmf_pno_detach(struct brcmf_cfg80211_info *cfg)
 	brcmf_dbg(TRACE, "enter\n");
 	pi = cfg->pno;
 	cfg->pno = NULL;
+	if (!pi)
+		return;
 
 	WARN_ON(pi->n_reqs);
 	mutex_destroy(&pi->req_lock);
-- 
2.53.0