From 0c3121fcf10da24dfd667c5bf8d71fcfa261599c Mon Sep 17 00:00:00 2001 From: hayeswang Date: Fri, 7 Mar 2014 11:04:36 +0800 Subject: [PATCH] r8152: up the priority of the transmission move the tx_bottom() from delayed_work to tasklet. It makes the rx and tx balanced. If the device is in runtime suspend when getting the tx packet, wakeup the device before trasmitting. Signed-off-by: Hayes Wang Signed-off-by: David S. Miller --- drivers/net/usb/r8152.c | 45 ++++++++++++++++++++++++----------------- 1 file changed, 27 insertions(+), 18 deletions(-) diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c index 00b3192568f..f1eaa18825a 100644 --- a/drivers/net/usb/r8152.c +++ b/drivers/net/usb/r8152.c @@ -447,6 +447,7 @@ enum rtl8152_flags { RTL8152_LINK_CHG, SELECTIVE_SUSPEND, PHY_RESET, + SCHEDULE_TASKLET, }; /* Define these values to match your device */ @@ -1071,7 +1072,7 @@ static void write_bulk_callback(struct urb *urb) return; if (!skb_queue_empty(&tp->tx_queue)) - schedule_delayed_work(&tp->schedule, 0); + tasklet_schedule(&tp->tl); } static void intr_callback(struct urb *urb) @@ -1335,9 +1336,9 @@ static int r8152_tx_agg_fill(struct r8152 *tp, struct tx_agg *agg) u8 *tx_data; __skb_queue_head_init(&skb_head); - spin_lock_bh(&tx_queue->lock); + spin_lock(&tx_queue->lock); skb_queue_splice_init(tx_queue, &skb_head); - spin_unlock_bh(&tx_queue->lock); + spin_unlock(&tx_queue->lock); tx_data = agg->head; agg->skb_num = agg->skb_len = 0; @@ -1374,20 +1375,20 @@ static int r8152_tx_agg_fill(struct r8152 *tp, struct tx_agg *agg) } if (!skb_queue_empty(&skb_head)) { - spin_lock_bh(&tx_queue->lock); + spin_lock(&tx_queue->lock); skb_queue_splice(&skb_head, tx_queue); - spin_unlock_bh(&tx_queue->lock); + spin_unlock(&tx_queue->lock); } - netif_tx_lock_bh(tp->netdev); + netif_tx_lock(tp->netdev); if (netif_queue_stopped(tp->netdev) && skb_queue_len(&tp->tx_queue) < tp->tx_qlen) netif_wake_queue(tp->netdev); - netif_tx_unlock_bh(tp->netdev); + netif_tx_unlock(tp->netdev); - ret = usb_autopm_get_interface(tp->intf); + ret = usb_autopm_get_interface_async(tp->intf); if (ret < 0) goto out_tx_fill; @@ -1395,9 +1396,9 @@ static int r8152_tx_agg_fill(struct r8152 *tp, struct tx_agg *agg) agg->head, (int)(tx_data - (u8 *)agg->head), (usb_complete_t)write_bulk_callback, agg); - ret = usb_submit_urb(agg->urb, GFP_KERNEL); + ret = usb_submit_urb(agg->urb, GFP_ATOMIC); if (ret < 0) - usb_autopm_put_interface(tp->intf); + usb_autopm_put_interface_async(tp->intf); out_tx_fill: return ret; @@ -1535,6 +1536,7 @@ static void bottom_half(unsigned long data) return; rx_bottom(tp); + tx_bottom(tp); } static @@ -1630,7 +1632,7 @@ static void _rtl8152_set_rx_mode(struct net_device *netdev) } static netdev_tx_t rtl8152_start_xmit(struct sk_buff *skb, - struct net_device *netdev) + struct net_device *netdev) { struct r8152 *tp = netdev_priv(netdev); @@ -1638,13 +1640,17 @@ static netdev_tx_t rtl8152_start_xmit(struct sk_buff *skb, skb_queue_tail(&tp->tx_queue, skb); - if (list_empty(&tp->tx_free) && - skb_queue_len(&tp->tx_queue) > tp->tx_qlen) + if (!list_empty(&tp->tx_free)) { + if (test_bit(SELECTIVE_SUSPEND, &tp->flags)) { + set_bit(SCHEDULE_TASKLET, &tp->flags); + schedule_delayed_work(&tp->schedule, 0); + } else { + usb_mark_last_busy(tp->udev); + tasklet_schedule(&tp->tl); + } + } else if (skb_queue_len(&tp->tx_queue) > tp->tx_qlen) netif_stop_queue(netdev); - if (!list_empty(&tp->tx_free)) - schedule_delayed_work(&tp->schedule, 0); - return NETDEV_TX_OK; } @@ -2523,8 +2529,11 @@ static void rtl_work_func_t(struct work_struct *work) if (test_bit(RTL8152_SET_RX_MODE, &tp->flags)) _rtl8152_set_rx_mode(tp->netdev); - if (tp->speed & LINK_STATUS) - tx_bottom(tp); + if (test_bit(SCHEDULE_TASKLET, &tp->flags) && + (tp->speed & LINK_STATUS)) { + clear_bit(SCHEDULE_TASKLET, &tp->flags); + tasklet_schedule(&tp->tl); + } if (test_bit(PHY_RESET, &tp->flags)) rtl_phy_reset(tp); -- 2.46.0