r8169: remove not needed check in rtl8169_start_xmit

In rtl_tx() the released descriptors are zero'ed by
rtl8169_unmap_tx_skb(). And in the beginning of rtl8169_start_xmit()
we check that enough descriptors are free, therefore there's no way
the DescOwn bit can be set here.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/6965d665-6c50-90c5-70e6-0bb335d4ea47@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index 04101a8..1acf712 100644 (file)
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -4180,17 +4180,12 @@ static netdev_tx_t rtl8169_start_xmit(struct sk_buff *skb,
        bool stop_queue, door_bell;
        u32 opts[2];
 
-       txd_first = tp->TxDescArray + entry;
-
        if (unlikely(!rtl_tx_slots_avail(tp))) {
                if (net_ratelimit())
                        netdev_err(dev, "BUG! Tx Ring full when queue awake!\n");
                goto err_stop_0;
        }
 
-       if (unlikely(le32_to_cpu(txd_first->opts1) & DescOwn))
-               goto err_stop_0;
-
        opts[1] = rtl8169_tx_vlan_tag(skb);
        opts[0] = 0;
 
@@ -4203,6 +4198,8 @@ static netdev_tx_t rtl8169_start_xmit(struct sk_buff *skb,
                                    entry, false)))
                goto err_dma_0;
 
+       txd_first = tp->TxDescArray + entry;
+
        if (frags) {
                if (rtl8169_xmit_frags(tp, skb, opts, entry))
                        goto err_dma_1;