From 95ef12394a4d002c7ed3bcbed224f3391792a02b Mon Sep 17 00:00:00 2001 From: Arend van Spriel Date: Wed, 26 Aug 2015 22:15:04 +0200 Subject: [PATCH] brcmfmac: introduce brcmf_net_detach() function In case of error during brcmf_bus_start() the network interfaces were freed using free_netdev(). However, the interfaces may have additional memory allocated which is not freed. The netdev has destructor set to brcmf_cfg80211_free_netdev() which frees the additional memory if allocated and call free_netdev(). The brcmf_net_detach() either calls brcmf_cfg80211_free_netdev() directly or uses unregister_netdev() when struct net_device::reg_state indicates the netdev was registered. Reported-by: Daniel (Deognyoun) Kim Reviewed-by: Hante Meuleman Reviewed-by: Franky (Zhenhui) Lin Reviewed-by: Pieter-Paul Giesberts Signed-off-by: Arend van Spriel Signed-off-by: Kalle Valo --- .../wireless/brcm80211/brcmfmac/cfg80211.c | 3 ++- .../net/wireless/brcm80211/brcmfmac/core.c | 21 ++++++++++++------- 2 files changed, 15 insertions(+), 9 deletions(-) diff --git a/drivers/net/wireless/brcm80211/brcmfmac/cfg80211.c b/drivers/net/wireless/brcm80211/brcmfmac/cfg80211.c index cee9ff46626e..600098dd197c 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/cfg80211.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/cfg80211.c @@ -4747,7 +4747,8 @@ void brcmf_cfg80211_free_netdev(struct net_device *ndev) ifp = netdev_priv(ndev); vif = ifp->vif; - brcmf_free_vif(vif); + if (vif) + brcmf_free_vif(vif); free_netdev(ndev); } diff --git a/drivers/net/wireless/brcm80211/brcmfmac/core.c b/drivers/net/wireless/brcm80211/brcmfmac/core.c index 5d81b74efb66..17658b59c36c 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/core.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/core.c @@ -718,8 +718,6 @@ int brcmf_net_attach(struct brcmf_if *ifp, bool rtnl_locked) } brcmf_dbg(INFO, "%s: Broadcom Dongle Host Driver\n", ndev->name); - - ndev->destructor = brcmf_cfg80211_free_netdev; return 0; fail: @@ -729,6 +727,14 @@ fail: return -EBADE; } +static void brcmf_net_detach(struct net_device *ndev) +{ + if (ndev->reg_state == NETREG_REGISTERED) + unregister_netdev(ndev); + else + brcmf_cfg80211_free_netdev(ndev); +} + static int brcmf_net_p2p_open(struct net_device *ndev) { brcmf_dbg(TRACE, "Enter\n"); @@ -805,8 +811,7 @@ struct brcmf_if *brcmf_add_if(struct brcmf_pub *drvr, s32 bssidx, s32 ifidx, ifp->ndev->name); if (ifidx) { netif_stop_queue(ifp->ndev); - unregister_netdev(ifp->ndev); - free_netdev(ifp->ndev); + brcmf_net_detach(ifp->ndev); drvr->iflist[bssidx] = NULL; } else { brcmf_err("ignore IF event\n"); @@ -828,6 +833,7 @@ struct brcmf_if *brcmf_add_if(struct brcmf_pub *drvr, s32 bssidx, s32 ifidx, if (!ndev) return ERR_PTR(-ENOMEM); + ndev->destructor = brcmf_cfg80211_free_netdev; ifp = netdev_priv(ndev); ifp->ndev = ndev; /* store mapping ifidx to bssidx */ @@ -879,8 +885,7 @@ static void brcmf_del_if(struct brcmf_pub *drvr, s32 bssidx) cancel_work_sync(&ifp->setmacaddr_work); cancel_work_sync(&ifp->multicast_work); } - /* unregister will take care of freeing it */ - unregister_netdev(ifp->ndev); + brcmf_net_detach(ifp->ndev); } } @@ -1056,11 +1061,11 @@ fail: brcmf_fws_deinit(drvr); } if (drvr->iflist[0]) { - free_netdev(ifp->ndev); + brcmf_net_detach(ifp->ndev); drvr->iflist[0] = NULL; } if (p2p_ifp) { - free_netdev(p2p_ifp->ndev); + brcmf_net_detach(p2p_ifp->ndev); drvr->iflist[1] = NULL; } return ret; -- 2.30.2