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Commit 0a797db3 authored by Alexander Duyck's avatar Alexander Duyck Committed by David S. Miller
Browse files

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: default avatarAlexander Duyck <alexander.h.duyck@intel.com>
Tested-by: default avatarAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 0bc0b97f

drivers/net/ethernet/intel/i40e/i40e_txrx.h

+1 −1
Original line number Diff line number Diff line
@@ -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)

drivers/net/ethernet/intel/i40evf/i40e_txrx.h

+1 −1
Original line number Diff line number Diff line
@@ -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)