Patch "brcmfmac: restore stopping netdev queue when bus clogs up" has been added to the 4.7-stable tree

This is a note to let you know that I've just added the patch titled

brcmfmac: restore stopping netdev queue when bus clogs up

to the 4.7-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
brcmfmac-restore-stopping-netdev-queue-when-bus-clogs-up.patch
and it can be found in the queue-4.7 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Arend Van Spriel <[email protected]>
Date: Fri, 15 Jul 2016 12:16:12 +0200
Subject: brcmfmac: restore stopping netdev queue when bus clogs up
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From: Arend Van Spriel <[email protected]>

commit 82bc9ab6a8f577d2174a736c33f3d4ecf7d9ef47 upstream.

When the host-interface bus has hard time handling transmit packets it informs higher layer about this and it would stop the netdev queue when needed. However, since commit 9cd18359d31e ("brcmfmac:
Make FWS queueing configurable.") this was broken. With this patch the behaviour is restored.

---
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c |   22 +++++++++---
 1 file changed, 17 insertions(+), 5 deletions(-)

@@ -2469,10 +2469,22 @@ void brcmf_fws_bustxfail(struct brcmf_fw
 void brcmf_fws_bus_blocked(struct brcmf_pub *drvr, bool flow_blocked)
 {
 	struct brcmf_fws_info *fws = drvr->fws;
+	struct brcmf_if *ifp;
+	int i;
 
-	fws->bus_flow_blocked = flow_blocked;
-	if (!flow_blocked)
-		brcmf_fws_schedule_deq(fws);
-	else
-		fws->stats.bus_flow_block++;
+	if (fws->avoid_queueing) {
+		for (i = 0; i < BRCMF_MAX_IFS; i++) {
+			ifp = drvr->iflist[i];
+			if (!ifp || !ifp->ndev)
+				continue;
+			brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FLOW,
+					     flow_blocked);
+		}
+	} else {
+		fws->bus_flow_blocked = flow_blocked;
+		if (!flow_blocked)
+			brcmf_fws_schedule_deq(fws);
+		else
+			fws->stats.bus_flow_block++;
+	}
 }

Patches currently in stable-queue which might be from [email protected] are

queue-4.7/brcmfmac-restore-stopping-netdev-queue-when-bus-clogs-up.patch