From: Per Forlin <per.forlin@xxxxxxxxx>
This patch resolves an issue where pend_8021x_cnt was not decreased
on txfinalize. This caused brcmf_netdev_wait_pend8021x to timeout
because the counter indicated pending packets.
WARNING: at .../brcmfmac/core.c:1289 brcmf_netdev_wait_pend8021x
(warn_slowpath_common)
(warn_slowpath_null)
(brcmf_netdev_wait_pend8021x [brcmfmac])
(send_key_to_dongle [brcmfmac])
(brcmf_cfg80211_del_key [brcmfmac])
(nl80211_del_key [cfg80211])
(genl_rcv_msg)
(netlink_rcv_skb)
(genl_rcv)
(netlink_unicast)
(netlink_sendmsg)
(sock_sendmsg)
(___sys_sendmsg)
(__sys_sendmsg)
(SyS_sendmsg)
The solution is to pull back the header offset in case
of an error in txdata(), which may happen in case of
packet overload in brcmf_sdio_bus_txdata.
Overloading an WLAN interface is not an unlikely scenario.
In case of packet overload the error print "out of bus->txq"
is very verbose. To reduce SPAM degrade it to a debug print.
Signed-off-by: Per Forlin <per.forlin@xxxxxxxxx>
---
Change log:
v2 - Add variable to know whether the counter is increased or not
v3 - txfinalize should decrease the counter. Adjust skb header offset
v4 - Fix build error
drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c | 4 ++++
drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c | 4 +++-
drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c | 2 +-
3 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
index ed9998b..f342f7c 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
@@ -541,6 +541,9 @@ void brcmf_txfinalize(struct brcmf_if *ifp, struct sk_buff *txp, bool success)
struct ethhdr *eh;
u16 type;
+ if (!ifp)
+ goto free;
+
eh = (struct ethhdr *)(txp->data);
type = ntohs(eh->h_proto);
@@ -553,6 +556,7 @@ void brcmf_txfinalize(struct brcmf_if *ifp, struct sk_buff *txp, bool success)
if (!success)
ifp->stats.tx_errors++;
+free:
brcmu_pkt_buf_free_skb(txp);
}
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c
index f82c9ab..98cb83f 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c
@@ -1899,8 +1899,10 @@ int brcmf_fws_process_skb(struct brcmf_if *ifp, struct sk_buff *skb)
if (fws->avoid_queueing) {
rc = brcmf_proto_txdata(drvr, ifp->ifidx, 0, skb);
- if (rc < 0)
+ if (rc < 0) {
+ (void)brcmf_proto_hdrpull(drvr, false, skb, &ifp);
brcmf_txfinalize(ifp, skb, false);
+ }
return rc;
}
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
index a14d9d9d..485e2ad 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
@@ -2721,7 +2721,7 @@ static int brcmf_sdio_bus_txdata(struct device *dev, struct sk_buff *pkt)
*(u16 *)(pkt->cb) = 0;
if (!brcmf_sdio_prec_enq(&bus->txq, pkt, prec)) {
skb_pull(pkt, bus->tx_hdrlen);
- brcmf_err("out of bus->txq !!!\n");
+ brcmf_dbg(INFO, "out of bus->txq !!!\n");
ret = -ENOSR;
} else {
ret = 0;
--
2.1.4
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