linux-kernel - [PATCH] net: ethernet: ti: cpsw_ale: optimize cpsw_ale

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Message-Id: <20221108135643.15094-1-rogerq@kernel.org>
Date:   Tue,  8 Nov 2022 15:56:43 +0200
From:   Roger Quadros <rogerq@...nel.org>
To:     davem@...emloft.net
Cc:     edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        vigneshr@...com, srk@...com, linux-omap@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Roger Quadros <rogerq@...nel.org>
Subject: [PATCH] net: ethernet: ti: cpsw_ale: optimize cpsw_ale_restore()

If an entry was FREE then we don't have to restore it.

Signed-off-by: Roger Quadros <rogerq@...nel.org>
---

Patch depends on
https://lore.kernel.org/netdev/20221104132310.31577-3-rogerq@kernel.org/T/

 drivers/net/ethernet/ti/cpsw_ale.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/ti/cpsw_ale.c b/drivers/net/ethernet/ti/cpsw_ale.c
index 0c5e783e574c..41bcf34a22f8 100644
--- a/drivers/net/ethernet/ti/cpsw_ale.c
+++ b/drivers/net/ethernet/ti/cpsw_ale.c
@@ -1452,12 +1452,15 @@ void cpsw_ale_dump(struct cpsw_ale *ale, u32 *data)
 	}
 }
 
+/* ALE table should be cleared (ALE_CLEAR) before cpsw_ale_restore() */
 void cpsw_ale_restore(struct cpsw_ale *ale, u32 *data)
 {
-	int i;
+	int i, type;
 
 	for (i = 0; i < ale->params.ale_entries; i++) {
-		cpsw_ale_write(ale, i, data);
+		type = cpsw_ale_get_entry_type(data);
+		if (type != ALE_TYPE_FREE)
+			cpsw_ale_write(ale, i, data);
 		data += ALE_ENTRY_WORDS;
 	}
 }
-- 
2.17.1