brcmfmac: decrement pending 8021x count upon tx failure

If the transmit fails because there are no hanger slots or
any other reason and the packet was an EAPOL packet the
pending counter should be decreased although it was not
transmitted so the driver does not end up in a dead-lock.

Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c b/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c
index f0d9f7f6c83d..29b1f24c2d0f 100644
--- a/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c
@@ -1744,13 +1744,14 @@ int brcmf_fws_process_skb(struct brcmf_if *ifp, struct sk_buff *skb)
         ulong flags;
         int fifo = BRCMF_FWS_FIFO_BCMC;
         bool multicast = is_multicast_ether_addr(eh->h_dest);
+        bool pae = eh->h_proto == htons(ETH_P_PAE);
 
         /* determine the priority */
         if (!skb->priority)
                 skb->priority = cfg80211_classify8021d(skb);
 
         drvr->tx_multicast += !!multicast;
-        if (ntohs(eh->h_proto) == ETH_P_PAE)
+        if (pae)
                 atomic_inc(&ifp->pend_8021x_cnt);
 
         if (!brcmf_fws_fc_active(fws)) {
@@ -1781,6 +1782,11 @@ int brcmf_fws_process_skb(struct brcmf_if *ifp, struct sk_buff *skb)
                 brcmf_fws_schedule_deq(fws);
         } else {
                 brcmf_err("drop skb: no hanger slot\n");
+                if (pae) {
+                        atomic_dec(&ifp->pend_8021x_cnt);
+                        if (waitqueue_active(&ifp->pend_8021x_wait))
+                                wake_up(&ifp->pend_8021x_wait);
+                }
                 brcmu_pkt_buf_free_skb(skb);
         }
         brcmf_fws_unlock(drvr, flags);