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49 lines
1.6 KiB
Diff
49 lines
1.6 KiB
Diff
From: Franky Lin <frankyl@broadcom.com>
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Date: Thu, 20 Aug 2015 22:06:06 +0200
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Subject: [PATCH] brcmfmac: block the correct flowring when backup queue
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overflow
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brcmf_flowring_block blocks the last active flowring under the same
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interface instead of the one provided by caller. This could lead to a
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dead lock of netif stop if there are more than one flowring under the
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interface and the traffic is high enough so brcmf_flowring_enqueue can
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not unblock the ring right away.
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Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
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Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
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Signed-off-by: Franky Lin <frankyl@broadcom.com>
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Signed-off-by: Arend van Spriel <arend@broadcom.com>
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Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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---
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--- a/drivers/net/wireless/brcm80211/brcmfmac/flowring.c
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+++ b/drivers/net/wireless/brcm80211/brcmfmac/flowring.c
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@@ -194,11 +194,15 @@ static void brcmf_flowring_block(struct
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spin_lock_irqsave(&flow->block_lock, flags);
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ring = flow->rings[flowid];
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+ if (ring->blocked == blocked) {
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+ spin_unlock_irqrestore(&flow->block_lock, flags);
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+ return;
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+ }
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ifidx = brcmf_flowring_ifidx_get(flow, flowid);
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currently_blocked = false;
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for (i = 0; i < flow->nrofrings; i++) {
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- if (flow->rings[i]) {
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+ if ((flow->rings[i]) && (i != flowid)) {
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ring = flow->rings[i];
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if ((ring->status == RING_OPEN) &&
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(brcmf_flowring_ifidx_get(flow, i) == ifidx)) {
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@@ -209,8 +213,8 @@ static void brcmf_flowring_block(struct
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}
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}
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}
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- ring->blocked = blocked;
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- if (currently_blocked == blocked) {
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+ flow->rings[flowid]->blocked = blocked;
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+ if (currently_blocked) {
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spin_unlock_irqrestore(&flow->block_lock, flags);
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return;
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}
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