i40e/i40evf: Update DESC_NEEDED value to reflect larger value

When compared to ixgbe and other previous Intel drivers the i40e and i40evf
drivers actually reserve 2 additional descriptors in maybe_stop_tx for
cache line alignment. We need to update DESC_NEEDED to reflect this as
otherwise we are more likely to return TX_BUSY which will cause issues with
things like xmit_more.

Signed-off-by: Alexander Duyck <[email protected]>
Tested-by: Andrew Bowers <[email protected]>
Signed-off-by: Jeff Kirsher <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.h b/drivers/net/ethernet/intel/i40e/i40e_txrx.h
index d4799b41e98aa8c980773ac10ebbe0710c011a24..701b708628b0d6271e592c588c250bbfeb3de995 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.h
@@ -279,7 +279,7 @@ static inline unsigned int i40e_txd_use_count(unsigned int size)
 }
 
 /* Tx Descriptors needed, worst case */
-#define DESC_NEEDED (MAX_SKB_FRAGS + 4)
+#define DESC_NEEDED (MAX_SKB_FRAGS + 6)
 #define I40E_MIN_DESC_PENDING  4
 
 #define I40E_TX_FLAGS_HW_VLAN          BIT(1)

diff --git a/drivers/net/ethernet/intel/i40evf/i40e_txrx.h b/drivers/net/ethernet/intel/i40evf/i40e_txrx.h
index e72f16b4555b114d2f30079a288304df08019c7b..7798a6645c3f1702bd4c4938647eb369d7e5293b 100644 (file)
--- a/drivers/net/ethernet/intel/i40evf/i40e_txrx.h
+++ b/drivers/net/ethernet/intel/i40evf/i40e_txrx.h
@@ -260,7 +260,7 @@ static inline unsigned int i40e_txd_use_count(unsigned int size)
 }
 
 /* Tx Descriptors needed, worst case */
-#define DESC_NEEDED (MAX_SKB_FRAGS + 4)
+#define DESC_NEEDED (MAX_SKB_FRAGS + 6)
 #define I40E_MIN_DESC_PENDING  4
 
 #define I40E_TX_FLAGS_HW_VLAN          BIT(1)