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i40e: refactor tail_bump check 

This patch refactors tail bump check.

Change-ID: Ide0e19171d67d90cb2b06b8dcd4fa791ae120160
Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Carolyn Wyborny 2016-08-04 11:37:03 -07:00 committed by Jeff Kirsher
parent fe458e5071
commit ffeac83685
2 changed files with 4 additions and 8 deletions
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6
drivers/net/ethernet/intel/i40e/i40e_txrx.c
View File

@ -2840,10 +2840,9 @@ static inline void i40e_tx_map(struct i40e_ring *tx_ring, struct sk_buff *skb,
I40E_TXD_QW1_CMD_SHIFT);
/* notify HW of packet */
if (!tail_bump)
if (!tail_bump) {
prefetchw(tx_desc + 1);
if (tail_bump) {
} else {
/* Force memory writes to complete before letting h/w
* know there are new descriptors to fetch. (Only
* applicable for weak-ordered memory model archs,
@ -2852,7 +2851,6 @@ static inline void i40e_tx_map(struct i40e_ring *tx_ring, struct sk_buff *skb,
wmb();
writel(i, tx_ring->tail);
}
return;
dma_error:

6
drivers/net/ethernet/intel/i40evf/i40e_txrx.c
View File

@ -2068,10 +2068,9 @@ static inline void i40evf_tx_map(struct i40e_ring *tx_ring, struct sk_buff *skb,
I40E_TXD_QW1_CMD_SHIFT);
/* notify HW of packet */
if (!tail_bump)
if (!tail_bump) {
prefetchw(tx_desc + 1);
if (tail_bump) {
} else {
/* Force memory writes to complete before letting h/w
* know there are new descriptors to fetch. (Only
* applicable for weak-ordered memory model archs,
@ -2080,7 +2079,6 @@ static inline void i40evf_tx_map(struct i40e_ring *tx_ring, struct sk_buff *skb,
wmb();
writel(i, tx_ring->tail);
}
return;
dma_error: