From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762258Ab3DCOBQ (ORCPT ); Wed, 3 Apr 2013 10:01:16 -0400 Received: from out1-smtp.messagingengine.com ([66.111.4.25]:58747 "EHLO out1-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758194Ab3DCOBI (ORCPT ); Wed, 3 Apr 2013 10:01:08 -0400 X-Sasl-enc: mGwEaavf9nwQXZBLtUZLFlMe9OIIS4KY+jx2VUFJcjMx 1364997667 From: Alan Ott To: Alexander Smirnov , Dmitry Eremin-Solenikov , "David S. Miller" Cc: linux-zigbee-devel@lists.sourceforge.net, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Alan Ott Subject: [PATCH v2 1/4] mac802154: Do not try to resend failed packets Date: Wed, 3 Apr 2013 10:00:55 -0400 Message-Id: <1364997658-16498-2-git-send-email-alan@signal11.us> X-Mailer: git-send-email 1.7.11.2 In-Reply-To: <1364997658-16498-1-git-send-email-alan@signal11.us> References: <1364928481-1813-1-git-send-email-alan@signal11.us> <1364997658-16498-1-git-send-email-alan@signal11.us> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When ops->xmit() fails, drop the packet. Devices which support hardware ack and retry (which include all devices currently supported by mainline), will automatically retry sending the packet (in the hardware) up to 3 times, per the 802.15.4 spec. There is no need, and it is incorrect to try to do it in mac802154. Signed-off-by: Alan Ott --- net/mac802154/mac802154.h | 2 -- net/mac802154/tx.c | 12 ++---------- 2 files changed, 2 insertions(+), 12 deletions(-) diff --git a/net/mac802154/mac802154.h b/net/mac802154/mac802154.h index 21fa386..5c9e021 100644 --- a/net/mac802154/mac802154.h +++ b/net/mac802154/mac802154.h @@ -88,8 +88,6 @@ struct mac802154_sub_if_data { #define mac802154_to_priv(_hw) container_of(_hw, struct mac802154_priv, hw) -#define MAC802154_MAX_XMIT_ATTEMPTS 3 - #define MAC802154_CHAN_NONE (~(u8)0) /* No channel is assigned */ extern struct ieee802154_reduced_mlme_ops mac802154_mlme_reduced; diff --git a/net/mac802154/tx.c b/net/mac802154/tx.c index 4e09d07..7264874 100644 --- a/net/mac802154/tx.c +++ b/net/mac802154/tx.c @@ -39,7 +39,6 @@ struct xmit_work { struct mac802154_priv *priv; u8 chan; u8 page; - u8 xmit_attempts; }; static void mac802154_xmit_worker(struct work_struct *work) @@ -60,18 +59,12 @@ static void mac802154_xmit_worker(struct work_struct *work) } res = xw->priv->ops->xmit(&xw->priv->hw, xw->skb); + if (res) + pr_debug("transmission failed\n"); out: mutex_unlock(&xw->priv->phy->pib_lock); - if (res) { - if (xw->xmit_attempts++ < MAC802154_MAX_XMIT_ATTEMPTS) { - queue_work(xw->priv->dev_workqueue, &xw->work); - return; - } else - pr_debug("transmission failed for %d times", - MAC802154_MAX_XMIT_ATTEMPTS); - } dev_kfree_skb(xw->skb); @@ -114,7 +107,6 @@ netdev_tx_t mac802154_tx(struct mac802154_priv *priv, struct sk_buff *skb, work->priv = priv; work->page = page; work->chan = chan; - work->xmit_attempts = 0; queue_work(priv->dev_workqueue, &work->work); -- 1.7.11.2