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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 <alexander.h.duyck@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Duyck 2018-01-26 08:54:45 -08:00 committed by David S. Miller
parent 0bc0b97fca
commit 0a797db323
2 changed files with 2 additions and 2 deletions
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2
drivers/net/ethernet/intel/i40e/i40e_txrx.h
View File

@ -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)

2
drivers/net/ethernet/intel/i40evf/i40e_txrx.h
View File

@ -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)