1 From: Arend Van Spriel <arend.vanspriel@broadcom.com>
2 Date: Fri, 15 Jul 2016 12:16:12 +0200
3 Subject: [PATCH] brcmfmac: restore stopping netdev queue when bus clogs up
5 Content-Type: text/plain; charset=UTF-8
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8 When the host-interface bus has hard time handling transmit packets
9 it informs higher layer about this and it would stop the netdev
10 queue when needed. However, since commit 9cd18359d31e ("brcmfmac:
11 Make FWS queueing configurable.") this was broken. With this patch
12 the behaviour is restored.
14 Cc: stable@vger.kernel.org # v4.5, v4.6, v4.7
15 Fixes: 9cd18359d31e ("brcmfmac: Make FWS queueing configurable.")
16 Tested-by: Per Förlin <per.forlin@gmail.com>
17 Reviewed-by: Hante Meuleman <hante.meuleman@broadcom.com>
18 Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com>
19 Reviewed-by: Franky Lin <franky.lin@broadcom.com>
20 Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
21 Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
24 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c
25 +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c
26 @@ -2469,10 +2469,22 @@ void brcmf_fws_bustxfail(struct brcmf_fw
27 void brcmf_fws_bus_blocked(struct brcmf_pub *drvr, bool flow_blocked)
29 struct brcmf_fws_info *fws = drvr->fws;
30 + struct brcmf_if *ifp;
33 - fws->bus_flow_blocked = flow_blocked;
35 - brcmf_fws_schedule_deq(fws);
37 - fws->stats.bus_flow_block++;
38 + if (fws->avoid_queueing) {
39 + for (i = 0; i < BRCMF_MAX_IFS; i++) {
40 + ifp = drvr->iflist[i];
41 + if (!ifp || !ifp->ndev)
43 + brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FLOW,
47 + fws->bus_flow_blocked = flow_blocked;
49 + brcmf_fws_schedule_deq(fws);
51 + fws->stats.bus_flow_block++;