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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 <dekim@broadcom.com>
Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
steinar/wifi_calib_4_9_kernel
Arend van Spriel 2015-08-26 22:15:04 +02:00 committed by Kalle Valo
parent c67d41ba6f
commit 95ef12394a
2 changed files with 15 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/wireless/brcm80211/brcmfmac/cfg80211.c
View File

@ -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);
}

21
drivers/net/wireless/brcm80211/brcmfmac/core.c
View File

@ -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;