diff mbox series

[net-next,2/4] i40e: remove unnecessary cleaned_count updates

Message ID 20210114143318.2171-3-cristian.dumitrescu@intel.com (mailing list archive)
State Awaiting Upstream
Delegated to: Netdev Maintainers
Headers show
Series i40e: small improvements on XDP path | expand

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netdev/cc_maintainers warning 12 maintainers not CCed: kpsingh@kernel.org anthony.l.nguyen@intel.com davem@davemloft.net jesse.brandeburg@intel.com andrii@kernel.org yhs@fb.com kuba@kernel.org ast@kernel.org daniel@iogearbox.net kafai@fb.com john.fastabend@gmail.com songliubraving@fb.com
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Commit Message

Cristian Dumitrescu Jan. 14, 2021, 2:33 p.m. UTC 
For performance reasons, remove the redundant updates of the cleaned_count
variable, as its value can be computed based on the ring next-to-clean
variable, which is consistently udpated.

Signed-off-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e_xsk.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/intel/i40e/i40e_xsk.c b/drivers/net/ethernet/intel/i40e/i40e_xsk.c
index dc11ecd1a55c..453ef30d9498 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_xsk.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_xsk.c
@@ -300,7 +300,6 @@  int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget)
 			bi = i40e_rx_bi(rx_ring, next_to_clean);
 			xsk_buff_free(*bi);
 			*bi = NULL;
-			cleaned_count++;
 			next_to_clean = (next_to_clean + 1) & count_mask;
 			continue;
 		}
@@ -325,7 +324,6 @@  int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget)
 			total_rx_bytes += size;
 			total_rx_packets++;
 
-			cleaned_count++;
 			next_to_clean = (next_to_clean + 1) & count_mask;
 			continue;
 		}
@@ -344,7 +342,6 @@  int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget)
 			break;
 		}
 
-		cleaned_count++;
 		next_to_clean = (next_to_clean + 1) & count_mask;
 
 		if (eth_skb_pad(skb))
@@ -358,6 +355,7 @@  int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget)
 	}
 
 	rx_ring->next_to_clean = next_to_clean;
+	cleaned_count = (next_to_clean - rx_ring->next_to_use - 1) & count_mask;
 
 	if (cleaned_count >= I40E_RX_BUFFER_WRITE)
 		failure = !i40e_alloc_rx_buffers_zc(rx_ring, cleaned_count);