ar71xx: clean up ethernet tx queue after reset, wake queues when done - fixes hangs...

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Backport of r47892

git-svn-id: svn://svn.openwrt.org/openwrt/branches/chaos_calmer@47895 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c b/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c
index dc77699..7241f14 100644 (file)
--- a/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c
+++ b/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c
@@ -30,6 +30,8 @@ MODULE_PARM_DESC(msg_level, "Message level (-1=defaults,0=none,...,16=all)");
 
 #define ETH_SWITCH_HEADER_LEN  2
 
+static int ag71xx_tx_packets(struct ag71xx *ag, bool flush);
+
 static inline unsigned int ag71xx_max_frame_len(unsigned int mtu)
 {
        return ETH_SWITCH_HEADER_LEN + ETH_HLEN + VLAN_HLEN + mtu + ETH_FCS_LEN;
@@ -512,6 +514,7 @@ static void ag71xx_fast_reset(struct ag71xx *ag)
 
        ag71xx_dma_reset(ag);
        ag71xx_hw_setup(ag);
+       ag71xx_tx_packets(ag, true);
 
        /* setup max frame length */
        ag71xx_wr(ag, AG71XX_REG_MAC_MFL,
@@ -531,6 +534,8 @@ static void ag71xx_hw_start(struct ag71xx *ag)
 
        /* enable interrupts */
        ag71xx_wr(ag, AG71XX_REG_INT_ENABLE, AG71XX_INT_INIT);
+
+       netif_wake_queue(ag->dev);
 }
 
 void ag71xx_link_adjust(struct ag71xx *ag)
@@ -898,7 +903,7 @@ static bool ag71xx_check_dma_stuck(struct ag71xx *ag, unsigned long timestamp)
        return false;
 }
 
-static int ag71xx_tx_packets(struct ag71xx *ag)
+static int ag71xx_tx_packets(struct ag71xx *ag, bool flush)
 {
        struct ag71xx_ring *ring = &ag->tx_ring;
        struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
@@ -913,7 +918,7 @@ static int ag71xx_tx_packets(struct ag71xx *ag)
                struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
                struct sk_buff *skb = ring->buf[i].skb;
 
-               if (!ag71xx_desc_empty(desc)) {
+               if (!flush && !ag71xx_desc_empty(desc)) {
                        if (pdata->is_ar7240 &&
                            ag71xx_check_dma_stuck(ag, ring->buf[i].timestamp))
                                schedule_work(&ag->restart_work);
@@ -1039,7 +1044,7 @@ static int ag71xx_poll(struct napi_struct *napi, int limit)
        int rx_done;
 
        pdata->ddr_flush();
-       tx_done = ag71xx_tx_packets(ag);
+       tx_done = ag71xx_tx_packets(ag, false);
 
        DBG("%s: processing RX ring\n", dev->name);
        rx_done = ag71xx_rx_packets(ag, limit);