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-rw-r--r--drivers/net/igb/igb.h4
-rw-r--r--drivers/net/igb/igb_main.c25
2 files changed, 18 insertions, 11 deletions
diff --git a/drivers/net/igb/igb.h b/drivers/net/igb/igb.h
index e18ac1bf45f..4e8464b9df2 100644
--- a/drivers/net/igb/igb.h
+++ b/drivers/net/igb/igb.h
@@ -182,10 +182,6 @@ struct igb_ring {
char name[IFNAMSIZ + 5];
};
-#define IGB_DESC_UNUSED(R) \
- ((((R)->next_to_clean > (R)->next_to_use) ? 0 : (R)->count) + \
- (R)->next_to_clean - (R)->next_to_use - 1)
-
#define E1000_RX_DESC_ADV(R, i) \
(&(((union e1000_adv_rx_desc *)((R).desc))[i]))
#define E1000_TX_DESC_ADV(R, i) \
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index 39ac375487d..3fd2efa91cb 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -278,6 +278,17 @@ static char *igb_get_time_str(struct igb_adapter *adapter,
#endif
/**
+ * igb_desc_unused - calculate if we have unused descriptors
+ **/
+static int igb_desc_unused(struct igb_ring *ring)
+{
+ if (ring->next_to_clean > ring->next_to_use)
+ return ring->next_to_clean - ring->next_to_use - 1;
+
+ return ring->count + ring->next_to_clean - ring->next_to_use - 1;
+}
+
+/**
* igb_init_module - Driver Registration Routine
*
* igb_init_module is the first routine called when the driver is
@@ -873,12 +884,12 @@ static void igb_configure(struct igb_adapter *adapter)
igb_rx_fifo_flush_82575(&adapter->hw);
- /* call IGB_DESC_UNUSED which always leaves
+ /* call igb_desc_unused which always leaves
* at least 1 descriptor unused to make sure
* next_to_use != next_to_clean */
for (i = 0; i < adapter->num_rx_queues; i++) {
struct igb_ring *ring = &adapter->rx_ring[i];
- igb_alloc_rx_buffers_adv(ring, IGB_DESC_UNUSED(ring));
+ igb_alloc_rx_buffers_adv(ring, igb_desc_unused(ring));
}
@@ -2661,7 +2672,7 @@ link_up:
igb_update_adaptive(&adapter->hw);
if (!netif_carrier_ok(netdev)) {
- if (IGB_DESC_UNUSED(tx_ring) + 1 < tx_ring->count) {
+ if (igb_desc_unused(tx_ring) + 1 < tx_ring->count) {
/* We've lost link, so the controller stops DMA,
* but we've got queued Tx work that's never going
* to get done, so reset controller to flush Tx.
@@ -3199,7 +3210,7 @@ static int __igb_maybe_stop_tx(struct net_device *netdev,
/* We need to check again in a case another CPU has just
* made room available. */
- if (IGB_DESC_UNUSED(tx_ring) < size)
+ if (igb_desc_unused(tx_ring) < size)
return -EBUSY;
/* A reprieve! */
@@ -3211,7 +3222,7 @@ static int __igb_maybe_stop_tx(struct net_device *netdev,
static int igb_maybe_stop_tx(struct net_device *netdev,
struct igb_ring *tx_ring, int size)
{
- if (IGB_DESC_UNUSED(tx_ring) >= size)
+ if (igb_desc_unused(tx_ring) >= size)
return 0;
return __igb_maybe_stop_tx(netdev, tx_ring, size);
}
@@ -4310,7 +4321,7 @@ static bool igb_clean_tx_irq(struct igb_ring *tx_ring)
if (unlikely(count &&
netif_carrier_ok(netdev) &&
- IGB_DESC_UNUSED(tx_ring) >= IGB_TX_QUEUE_WAKE)) {
+ igb_desc_unused(tx_ring) >= IGB_TX_QUEUE_WAKE)) {
/* Make sure that anybody stopping the queue after this
* sees the new next_to_clean.
*/
@@ -4587,7 +4598,7 @@ next_desc:
}
rx_ring->next_to_clean = i;
- cleaned_count = IGB_DESC_UNUSED(rx_ring);
+ cleaned_count = igb_desc_unused(rx_ring);
if (cleaned_count)
igb_alloc_rx_buffers_adv(rx_ring, cleaned_count);