diff mbox

[V2,4.9] brcmfmac: use correct skb freeing helper when deleting flowring

Message ID 20160927121104.5771-1-zajec5@gmail.com (mailing list archive)
State Accepted
Commit 7f00ee2bbc630900ba16fc2690473f3e2db0e264
Delegated to: Kalle Valo
Headers show

Commit Message

Rafał Miłecki Sept. 27, 2016, 12:11 p.m. UTC 
From: Rafał Miłecki <rafal@milecki.pl>

Flowrings contain skbs waiting for transmission that were passed to us
by netif. It means we checked every one of them looking for 802.1x
Ethernet type. When deleting flowring we have to use freeing function
that will check for 802.1x type as well.

Freeing skbs without a proper check was leading to counter not being
properly decreased. This was triggering a WARNING every time
brcmf_netdev_wait_pend8021x was called.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Arend van Spriel <arend@broadcom.com>
Cc: stable@vger.kernel.org # 4.5+
---
V2: Add Cc for stable 4.5+. It doesn't apply cleanly to 4.4 and is not
    possible for 4.3- due to missing brcmf_get_ifp.
---
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/flowring.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

Comments

Kalle Valo Sept. 27, 2016, 3:48 p.m. UTC | #1 
Rafał Miłecki wrote:
> From: Rafał Miłecki <rafal@milecki.pl>
> 
> Flowrings contain skbs waiting for transmission that were passed to us
> by netif. It means we checked every one of them looking for 802.1x
> Ethernet type. When deleting flowring we have to use freeing function
> that will check for 802.1x type as well.
> 
> Freeing skbs without a proper check was leading to counter not being
> properly decreased. This was triggering a WARNING every time
> brcmf_netdev_wait_pend8021x was called.
> 
> Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
> Acked-by: Arend van Spriel <arend@broadcom.com>
> Cc: stable@vger.kernel.org # 4.5+

Patch applied to wireless-drivers-next.git, thanks.

7f00ee2bbc63 brcmfmac: use correct skb freeing helper when deleting flowring
diff mbox

Patch

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/flowring.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/flowring.c
index b16b367..d0b738d 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/flowring.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/flowring.c
@@ -234,13 +234,20 @@  static void brcmf_flowring_block(struct brcmf_flowring *flow, u16 flowid,
 
 void brcmf_flowring_delete(struct brcmf_flowring *flow, u16 flowid)
 {
+	struct brcmf_bus *bus_if = dev_get_drvdata(flow->dev);
 	struct brcmf_flowring_ring *ring;
+	struct brcmf_if *ifp;
 	u16 hash_idx;
+	u8 ifidx;
 	struct sk_buff *skb;
 
 	ring = flow->rings[flowid];
 	if (!ring)
 		return;
+
+	ifidx = brcmf_flowring_ifidx_get(flow, flowid);
+	ifp = brcmf_get_ifp(bus_if->drvr, ifidx);
+
 	brcmf_flowring_block(flow, flowid, false);
 	hash_idx = ring->hash_id;
 	flow->hash[hash_idx].ifidx = BRCMF_FLOWRING_INVALID_IFIDX;
@@ -249,7 +256,7 @@  void brcmf_flowring_delete(struct brcmf_flowring *flow, u16 flowid)
 
 	skb = skb_dequeue(&ring->skblist);
 	while (skb) {
-		brcmu_pkt_buf_free_skb(skb);
+		brcmf_txfinalize(ifp, skb, false);
 		skb = skb_dequeue(&ring->skblist);
 	}