From 6e10785ee148655577885b65605836210a741bee Mon Sep 17 00:00:00 2001 From: Loic Poulain Date: Mon, 11 Jan 2021 19:07:42 +0100 Subject: [PATCH] net: mhi: Get rid of local rx queue count Use the new mhi_get_free_desc_count helper to track queue usage instead of relying on the locally maintained rx_queued count. Signed-off-by: Loic Poulain Signed-off-by: Jakub Kicinski --- drivers/net/mhi_net.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/drivers/net/mhi_net.c b/drivers/net/mhi_net.c index abdd2baa312a..4f512531b7d0 100644 --- a/drivers/net/mhi_net.c +++ b/drivers/net/mhi_net.c @@ -25,7 +25,6 @@ struct mhi_net_stats { u64_stats_t tx_bytes; u64_stats_t tx_errors; u64_stats_t tx_dropped; - atomic_t rx_queued; struct u64_stats_sync tx_syncp; struct u64_stats_sync rx_syncp; }; @@ -138,9 +137,9 @@ static void mhi_net_dl_callback(struct mhi_device *mhi_dev, { struct mhi_net_dev *mhi_netdev = dev_get_drvdata(&mhi_dev->dev); struct sk_buff *skb = mhi_res->buf_addr; - int remaining; + int free_desc_count; - remaining = atomic_dec_return(&mhi_netdev->stats.rx_queued); + free_desc_count = mhi_get_free_desc_count(mhi_dev, DMA_FROM_DEVICE); if (unlikely(mhi_res->transaction_status)) { dev_kfree_skb_any(skb); @@ -175,7 +174,7 @@ static void mhi_net_dl_callback(struct mhi_device *mhi_dev, } /* Refill if RX buffers queue becomes low */ - if (remaining <= mhi_netdev->rx_queue_sz / 2) + if (free_desc_count >= mhi_netdev->rx_queue_sz / 2) schedule_delayed_work(&mhi_netdev->rx_refill, 0); } @@ -222,7 +221,7 @@ static void mhi_net_rx_refill_work(struct work_struct *work) struct sk_buff *skb; int err; - while (atomic_read(&mhi_netdev->stats.rx_queued) < mhi_netdev->rx_queue_sz) { + while (!mhi_queue_is_full(mdev, DMA_FROM_DEVICE)) { skb = netdev_alloc_skb(ndev, size); if (unlikely(!skb)) break; @@ -235,8 +234,6 @@ static void mhi_net_rx_refill_work(struct work_struct *work) break; } - atomic_inc(&mhi_netdev->stats.rx_queued); - /* Do not hog the CPU if rx buffers are consumed faster than * queued (unlikely). */ @@ -244,7 +241,7 @@ static void mhi_net_rx_refill_work(struct work_struct *work) } /* If we're still starved of rx buffers, reschedule later */ - if (unlikely(!atomic_read(&mhi_netdev->stats.rx_queued))) + if (mhi_get_free_desc_count(mdev, DMA_FROM_DEVICE) == mhi_netdev->rx_queue_sz) schedule_delayed_work(&mhi_netdev->rx_refill, HZ / 2); } -- 2.39.5