r8169: replace macro TX_FRAGS_READY_FOR with a function

Replace macro TX_FRAGS_READY_FOR with function rtl_tx_slots_avail
to make code cleaner and type-safe.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index a7e97e365a2de7d3603a8ff4c52ead1510e251c3..12811f18c134d3ff0f6e9980ecce8813fd8b31c4 100644 (file)
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -56,13 +56,6 @@
 #define R8169_MSG_DEFAULT \
        (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_IFUP | NETIF_MSG_IFDOWN)
 
-#define TX_SLOTS_AVAIL(tp) \
-       (tp->dirty_tx + NUM_TX_DESC - tp->cur_tx)
-
-/* A skbuff with nr_frags needs nr_frags+1 entries in the tx queue */
-#define TX_FRAGS_READY_FOR(tp,nr_frags) \
-       (TX_SLOTS_AVAIL(tp) >= (nr_frags + 1))
-
 /* Maximum number of multicast addresses to filter (vs. Rx-all-multicast).
    The RTL chips use a 64 element hash table based on the Ethernet CRC. */
 static const int multicast_filter_limit = 32;
@@ -6058,6 +6051,15 @@ static bool rtl8169_tso_csum_v2(struct rtl8169_private *tp,
        return true;
 }
 
+static bool rtl_tx_slots_avail(struct rtl8169_private *tp,
+                              unsigned int nr_frags)
+{
+       unsigned int slots_avail = tp->dirty_tx + NUM_TX_DESC - tp->cur_tx;
+
+       /* A skbuff with nr_frags needs nr_frags+1 entries in the tx queue */
+       return slots_avail > nr_frags;
+}
+
 static netdev_tx_t rtl8169_start_xmit(struct sk_buff *skb,
                                      struct net_device *dev)
 {
@@ -6069,7 +6071,7 @@ static netdev_tx_t rtl8169_start_xmit(struct sk_buff *skb,
        u32 opts[2], len;
        int frags;
 
-       if (unlikely(!TX_FRAGS_READY_FOR(tp, skb_shinfo(skb)->nr_frags))) {
+       if (unlikely(!rtl_tx_slots_avail(tp, skb_shinfo(skb)->nr_frags))) {
                netif_err(tp, drv, dev, "BUG! Tx Ring full when queue awake!\n");
                goto err_stop_0;
        }
@@ -6126,7 +6128,7 @@ static netdev_tx_t rtl8169_start_xmit(struct sk_buff *skb,
 
        mmiowb();
 
-       if (!TX_FRAGS_READY_FOR(tp, MAX_SKB_FRAGS)) {
+       if (!rtl_tx_slots_avail(tp, MAX_SKB_FRAGS)) {
                /* Avoid wrongly optimistic queue wake-up: rtl_tx thread must
                 * not miss a ring update when it notices a stopped queue.
                 */
@@ -6140,7 +6142,7 @@ static netdev_tx_t rtl8169_start_xmit(struct sk_buff *skb,
                 * can't.
                 */
                smp_mb();
-               if (TX_FRAGS_READY_FOR(tp, MAX_SKB_FRAGS))
+               if (rtl_tx_slots_avail(tp, MAX_SKB_FRAGS))
                        netif_wake_queue(dev);
        }
 
@@ -6258,7 +6260,7 @@ static void rtl_tx(struct net_device *dev, struct rtl8169_private *tp,
                 */
                smp_mb();
                if (netif_queue_stopped(dev) &&
-                   TX_FRAGS_READY_FOR(tp, MAX_SKB_FRAGS)) {
+                   rtl_tx_slots_avail(tp, MAX_SKB_FRAGS)) {
                        netif_wake_queue(dev);
                }
                /*