diff mbox series

[v4,27/40] ethernet: rocker: optimize ofdpa_port_internal_vlan_id_get()

Message ID 20240620175703.605111-28-yury.norov@gmail.com (mailing list archive)
State Not Applicable
Delegated to: Netdev Maintainers
Headers show
Series lib/find: add atomic find_bit() primitives | expand

Commit Message

Yury Norov June 20, 2024, 5:56 p.m. UTC 
Optimize ofdpa_port_internal_vlan_id_get() by using find_and_set_bit(),
instead of polling every bit from bitmap in a for-loop.

Signed-off-by: Yury Norov <yury.norov@gmail.com>
---
 drivers/net/ethernet/rocker/rocker_ofdpa.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/rocker/rocker_ofdpa.c b/drivers/net/ethernet/rocker/rocker_ofdpa.c
index 826990459fa4..d8fe018001b9 100644
--- a/drivers/net/ethernet/rocker/rocker_ofdpa.c
+++ b/drivers/net/ethernet/rocker/rocker_ofdpa.c
@@ -6,6 +6,7 @@ 
  * Copyright (c) 2014-2016 Jiri Pirko <jiri@mellanox.com>
  */
 
+#include <linux/find_atomic.h>
 #include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/spinlock.h>
@@ -2249,14 +2250,11 @@  static __be16 ofdpa_port_internal_vlan_id_get(struct ofdpa_port *ofdpa_port,
 	found = entry;
 	hash_add(ofdpa->internal_vlan_tbl, &found->entry, found->ifindex);
 
-	for (i = 0; i < OFDPA_N_INTERNAL_VLANS; i++) {
-		if (test_and_set_bit(i, ofdpa->internal_vlan_bitmap))
-			continue;
+	i = find_and_set_bit(ofdpa->internal_vlan_bitmap, OFDPA_N_INTERNAL_VLANS);
+	if (i < OFDPA_N_INTERNAL_VLANS)
 		found->vlan_id = htons(OFDPA_INTERNAL_VLAN_ID_BASE + i);
-		goto found;
-	}
-
-	netdev_err(ofdpa_port->dev, "Out of internal VLAN IDs\n");
+	else
+		netdev_err(ofdpa_port->dev, "Out of internal VLAN IDs\n");
 
 found:
 	found->ref_count++;