package/kernel/mac80211/patches/319-0008-brcmfmac-restore-stopping-netdev-queue-when-bus-clog.patch

   1 From 82bc9ab6a8f577d2174a736c33f3d4ecf7d9ef47 Mon Sep 17 00:00:00 2001
   2 From: Arend Van Spriel <arend.vanspriel@broadcom.com>
   3 Date: Fri, 15 Jul 2016 12:16:12 +0200
   4 Subject: [PATCH] brcmfmac: restore stopping netdev queue when bus clogs up
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 When the host-interface bus has hard time handling transmit packets
  10 it informs higher layer about this and it would stop the netdev
  11 queue when needed. However, since commit 9cd18359d31e ("brcmfmac:
  12 Make FWS queueing configurable.") this was broken. With this patch
  13 the behaviour is restored.
  14
  15 Cc: stable@vger.kernel.org # v4.5, v4.6, v4.7
  16 Fixes: 9cd18359d31e ("brcmfmac: Make FWS queueing configurable.")
  17 Tested-by: Per Förlin <per.forlin@gmail.com>
  18 Reviewed-by: Hante Meuleman <hante.meuleman@broadcom.com>
  19 Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com>
  20 Reviewed-by: Franky Lin <franky.lin@broadcom.com>
  21 Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
  22 Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
  23 ---
  24  .../broadcom/brcm80211/brcmfmac/fwsignal.c         | 22 +++++++++++++++++-----
  25  1 file changed, 17 insertions(+), 5 deletions(-)
  26
  27 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c
  28 +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c
  29 @@ -2469,10 +2469,22 @@ void brcmf_fws_bustxfail(struct brcmf_fw
  30  void brcmf_fws_bus_blocked(struct brcmf_pub *drvr, bool flow_blocked)
  31  {
  32         struct brcmf_fws_info *fws = drvr->fws;
  33 +       struct brcmf_if *ifp;
  34 +       int i;
  35
  36 -       fws->bus_flow_blocked = flow_blocked;
  37 -       if (!flow_blocked)
  38 -               brcmf_fws_schedule_deq(fws);
  39 -       else
  40 -               fws->stats.bus_flow_block++;
  41 +       if (fws->avoid_queueing) {
  42 +               for (i = 0; i < BRCMF_MAX_IFS; i++) {
  43 +                       ifp = drvr->iflist[i];
  44 +                       if (!ifp || !ifp->ndev)
  45 +                               continue;
  46 +                       brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FLOW,
  47 +                                            flow_blocked);
  48 +               }
  49 +       } else {
  50 +               fws->bus_flow_blocked = flow_blocked;
  51 +               if (!flow_blocked)
  52 +                       brcmf_fws_schedule_deq(fws);
  53 +               else
  54 +                       fws->stats.bus_flow_block++;
  55 +       }
  56  }