diff options
| author | Wright Feng <wright.feng@cypress.com> | 2022-07-22 14:56:26 +0300 |
|---|---|---|
| committer | Kalle Valo <kvalo@kernel.org> | 2022-08-10 08:47:22 +0300 |
| commit | 0fa24196e4257bcad0c5c82d93508536426db4a2 (patch) | |
| tree | 2df0ceea65018cdaa701585aa40f43850f626184 /drivers/net/wireless | |
| parent | bafe9528b792f4a442aa1ea2b0297cd53a0351ab (diff) | |
| download | linux-0fa24196e4257bcad0c5c82d93508536426db4a2.tar.xz | |
wifi: brcmfmac: fix continuous 802.1x tx pending timeout error
The race condition in brcmf_msgbuf_txflow and brcmf_msgbuf_delete_flowring
makes tx_msghdr writing after brcmf_msgbuf_remove_flowring. Host
driver should delete flowring after txflow complete and all txstatus back,
or pend_8021x_cnt will never be zero and cause every connection 950
milliseconds(MAX_WAIT_FOR_8021X_TX) delay.
Signed-off-by: Wright Feng <wright.feng@cypress.com>
Signed-off-by: Chi-hsien Lin <chi-hsien.lin@cypress.com>
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Alvin Šipraga <alsi@bang-olufsen.dk>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220722115632.620681-2-alvin@pqrs.dk
Diffstat (limited to 'drivers/net/wireless')
| -rw-r--r-- | drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c | 4 | ||||
| -rw-r--r-- | drivers/net/wireless/broadcom/brcm80211/brcmfmac/msgbuf.c | 23 |
2 files changed, 25 insertions, 2 deletions
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c index bd164a0821f9..e476d7d45396 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c @@ -1480,8 +1480,10 @@ int brcmf_netdev_wait_pend8021x(struct brcmf_if *ifp) !brcmf_get_pend_8021x_cnt(ifp), MAX_WAIT_FOR_8021X_TX); - if (!err) + if (!err) { bphy_err(drvr, "Timed out waiting for no pending 802.1x packets\n"); + atomic_set(&ifp->pend_8021x_cnt, 0); + } return !err; } diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/msgbuf.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/msgbuf.c index b2d0f7570aa9..174584b42972 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/msgbuf.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/msgbuf.c @@ -71,6 +71,7 @@ #define BRCMF_MSGBUF_TRICKLE_TXWORKER_THRS 32 #define BRCMF_MSGBUF_UPDATE_RX_PTR_THRS 48 +#define BRCMF_MAX_TXSTATUS_WAIT_RETRIES 10 struct msgbuf_common_hdr { u8 msgtype; @@ -806,8 +807,12 @@ static int brcmf_msgbuf_tx_queue_data(struct brcmf_pub *drvr, int ifidx, flowid = brcmf_flowring_lookup(flow, eh->h_dest, skb->priority, ifidx); if (flowid == BRCMF_FLOWRING_INVALID_ID) { flowid = brcmf_msgbuf_flowring_create(msgbuf, ifidx, skb); - if (flowid == BRCMF_FLOWRING_INVALID_ID) + if (flowid == BRCMF_FLOWRING_INVALID_ID) { return -ENOMEM; + } else { + brcmf_flowring_enqueue(flow, flowid, skb); + return 0; + } } queue_count = brcmf_flowring_enqueue(flow, flowid, skb); force = ((queue_count % BRCMF_MSGBUF_TRICKLE_TXWORKER_THRS) == 0); @@ -1395,9 +1400,25 @@ void brcmf_msgbuf_delete_flowring(struct brcmf_pub *drvr, u16 flowid) struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd; struct msgbuf_tx_flowring_delete_req *delete; struct brcmf_commonring *commonring; + struct brcmf_commonring *commonring_del; + void *ret_ptr; u8 ifidx; int err; + int retry = BRCMF_MAX_TXSTATUS_WAIT_RETRIES; + + /* wait for commonring txflow finished */ + commonring_del = msgbuf->flowrings[flowid]; + brcmf_commonring_lock(commonring_del); + while (retry && atomic_read(&commonring_del->outstanding_tx)) { + usleep_range(5000, 10000); + retry--; + } + brcmf_commonring_unlock(commonring_del); + if (!retry && atomic_read(&commonring_del->outstanding_tx)) { + brcmf_err("timed out waiting for txstatus\n"); + atomic_set(&commonring_del->outstanding_tx, 0); + } /* no need to submit if firmware can not be reached */ if (drvr->bus_if->state != BRCMF_BUS_UP) { |