From 25c440704661c1e842516f9364c9cb022a44c5b9 Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Tue, 6 Nov 2018 15:15:17 -0800 Subject: [PATCH] net: systemport: Simplify queue mapping logic The use of a bitmap speeds up the finding of the first available queue to which we could start establishing the mapping for, but we still have to loop over all slave network devices to set them up. Simplify the logic to have a single loop, and use the fact that a correctly configured ring has inspect set to true. This will make things simpler to unwind during device unregistration. Signed-off-by: Florian Fainelli Signed-off-by: David S. Miller --- drivers/net/ethernet/broadcom/bcmsysport.c | 17 +++++++++-------- drivers/net/ethernet/broadcom/bcmsysport.h | 1 - 2 files changed, 9 insertions(+), 9 deletions(-) diff --git a/drivers/net/ethernet/broadcom/bcmsysport.c b/drivers/net/ethernet/broadcom/bcmsysport.c index 2e60dda32adc..a161d3282321 100644 --- a/drivers/net/ethernet/broadcom/bcmsysport.c +++ b/drivers/net/ethernet/broadcom/bcmsysport.c @@ -2324,7 +2324,7 @@ static int bcm_sysport_map_queues(struct notifier_block *nb, struct bcm_sysport_priv *priv; struct net_device *slave_dev; unsigned int num_tx_queues; - unsigned int q, start, port; + unsigned int q, qp, port; struct net_device *dev; priv = container_of(nb, struct bcm_sysport_priv, dsa_notifier); @@ -2363,20 +2363,21 @@ static int bcm_sysport_map_queues(struct notifier_block *nb, priv->per_port_num_tx_queues = num_tx_queues; - start = find_first_zero_bit(&priv->queue_bitmap, dev->num_tx_queues); - for (q = 0; q < num_tx_queues; q++) { - ring = &priv->tx_rings[q + start]; + for (q = 0, qp = 0; q < dev->num_tx_queues && qp < num_tx_queues; + q++) { + ring = &priv->tx_rings[q]; + + if (ring->inspect) + continue; /* Just remember the mapping actual programming done * during bcm_sysport_init_tx_ring */ - ring->switch_queue = q; + ring->switch_queue = qp; ring->switch_port = port; ring->inspect = true; priv->ring_map[q + port * num_tx_queues] = ring; - - /* Set all queues as being used now */ - set_bit(q + start, &priv->queue_bitmap); + qp++; } return 0; diff --git a/drivers/net/ethernet/broadcom/bcmsysport.h b/drivers/net/ethernet/broadcom/bcmsysport.h index 7a0b7bfedd19..0887e6356649 100644 --- a/drivers/net/ethernet/broadcom/bcmsysport.h +++ b/drivers/net/ethernet/broadcom/bcmsysport.h @@ -796,7 +796,6 @@ struct bcm_sysport_priv { /* map information between switch port queues and local queues */ struct notifier_block dsa_notifier; unsigned int per_port_num_tx_queues; - unsigned long queue_bitmap; struct bcm_sysport_tx_ring *ring_map[DSA_MAX_PORTS * 8]; }; -- 2.30.2