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100 lines
2.9 KiB
Diff
100 lines
2.9 KiB
Diff
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From: Arend van Spriel <arend@broadcom.com>
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Date: Wed, 26 Aug 2015 22:15:04 +0200
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Subject: [PATCH] brcmfmac: introduce brcmf_net_detach() function
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In case of error during brcmf_bus_start() the network interfaces were
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freed using free_netdev(). However, the interfaces may have additional
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memory allocated which is not freed. The netdev has destructor set to
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brcmf_cfg80211_free_netdev() which frees the additional memory if
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allocated and call free_netdev(). The brcmf_net_detach() either calls
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brcmf_cfg80211_free_netdev() directly or uses unregister_netdev() when
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struct net_device::reg_state indicates the netdev was registered.
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Reported-by: Daniel (Deognyoun) Kim <dekim@broadcom.com>
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Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
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Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
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Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
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Signed-off-by: Arend van Spriel <arend@broadcom.com>
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---
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--- a/drivers/net/wireless/brcm80211/brcmfmac/cfg80211.c
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+++ b/drivers/net/wireless/brcm80211/brcmfmac/cfg80211.c
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@@ -4747,7 +4747,8 @@ void brcmf_cfg80211_free_netdev(struct n
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ifp = netdev_priv(ndev);
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vif = ifp->vif;
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- brcmf_free_vif(vif);
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+ if (vif)
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+ brcmf_free_vif(vif);
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free_netdev(ndev);
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}
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--- a/drivers/net/wireless/brcm80211/brcmfmac/core.c
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+++ b/drivers/net/wireless/brcm80211/brcmfmac/core.c
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@@ -718,8 +718,6 @@ int brcmf_net_attach(struct brcmf_if *if
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}
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brcmf_dbg(INFO, "%s: Broadcom Dongle Host Driver\n", ndev->name);
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-
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- ndev->destructor = brcmf_cfg80211_free_netdev;
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return 0;
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fail:
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@@ -729,6 +727,14 @@ fail:
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return -EBADE;
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}
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+static void brcmf_net_detach(struct net_device *ndev)
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+{
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+ if (ndev->reg_state == NETREG_REGISTERED)
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+ unregister_netdev(ndev);
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+ else
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+ brcmf_cfg80211_free_netdev(ndev);
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+}
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+
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static int brcmf_net_p2p_open(struct net_device *ndev)
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{
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brcmf_dbg(TRACE, "Enter\n");
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@@ -805,8 +811,7 @@ struct brcmf_if *brcmf_add_if(struct brc
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ifp->ndev->name);
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if (ifidx) {
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netif_stop_queue(ifp->ndev);
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- unregister_netdev(ifp->ndev);
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- free_netdev(ifp->ndev);
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+ brcmf_net_detach(ifp->ndev);
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drvr->iflist[bssidx] = NULL;
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} else {
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brcmf_err("ignore IF event\n");
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@@ -828,6 +833,7 @@ struct brcmf_if *brcmf_add_if(struct brc
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if (!ndev)
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return ERR_PTR(-ENOMEM);
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+ ndev->destructor = brcmf_cfg80211_free_netdev;
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ifp = netdev_priv(ndev);
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ifp->ndev = ndev;
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/* store mapping ifidx to bssidx */
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@@ -879,8 +885,7 @@ static void brcmf_del_if(struct brcmf_pu
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cancel_work_sync(&ifp->setmacaddr_work);
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cancel_work_sync(&ifp->multicast_work);
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}
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- /* unregister will take care of freeing it */
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- unregister_netdev(ifp->ndev);
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+ brcmf_net_detach(ifp->ndev);
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}
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}
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@@ -1056,11 +1061,11 @@ fail:
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brcmf_fws_deinit(drvr);
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}
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if (drvr->iflist[0]) {
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- free_netdev(ifp->ndev);
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+ brcmf_net_detach(ifp->ndev);
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drvr->iflist[0] = NULL;
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}
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if (p2p_ifp) {
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- free_netdev(p2p_ifp->ndev);
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+ brcmf_net_detach(p2p_ifp->ndev);
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drvr->iflist[1] = NULL;
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}
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return ret;
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