From: Hante Meuleman Date: Fri, 18 Sep 2015 20:08:13 +0000 (+0200) Subject: brcmfmac: Only handle p2p_stop_device if vif is valid X-Git-Tag: v4.14-rc1~4436^2~157^2~17 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d1bb34c128f59c30b75b96ef60f5f00cdbe9ca0e;p=platform%2Fkernel%2Flinux-rpi.git brcmfmac: Only handle p2p_stop_device if vif is valid In some situations it is possible that vif has been removed while cfg80211 invokes the p2p_stop_device handler. This will result in crash. Reviewed-by: Arend Van Spriel Reviewed-by: Pieter-Paul Giesberts Signed-off-by: Hante Meuleman Signed-off-by: Arend van Spriel Signed-off-by: Kalle Valo --- diff --git a/drivers/net/wireless/brcm80211/brcmfmac/p2p.c b/drivers/net/wireless/brcm80211/brcmfmac/p2p.c index 83027dc..76e4771 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/p2p.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/p2p.c @@ -2327,11 +2327,17 @@ void brcmf_p2p_stop_device(struct wiphy *wiphy, struct wireless_dev *wdev) struct brcmf_cfg80211_vif *vif; vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev); - mutex_lock(&cfg->usr_sync); - (void)brcmf_p2p_deinit_discovery(p2p); - brcmf_abort_scanning(cfg); - clear_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state); - mutex_unlock(&cfg->usr_sync); + /* This call can be result of the unregister_wdev call. In that case + * we dont want to do anything anymore. Just return. The config vif + * will have been cleared at this point. + */ + if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif == vif) { + mutex_lock(&cfg->usr_sync); + (void)brcmf_p2p_deinit_discovery(p2p); + brcmf_abort_scanning(cfg); + clear_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state); + mutex_unlock(&cfg->usr_sync); + } } /**