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53 lines
1.7 KiB
Diff
53 lines
1.7 KiB
Diff
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From: Lorenzo Bianconi <lorenzo@kernel.org>
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Date: Tue, 10 Jan 2023 10:31:26 +0100
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Subject: [PATCH] net: ethernet: mtk_wed: get rid of queue lock for rx queue
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Queue spinlock is currently held in mtk_wed_wo_queue_rx_clean and
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mtk_wed_wo_queue_refill routines for MTK Wireless Ethernet Dispatcher
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MCU rx queue. mtk_wed_wo_queue_refill() is running during initialization
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and in rx tasklet while mtk_wed_wo_queue_rx_clean() is running in
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mtk_wed_wo_hw_deinit() during hw de-init phase after rx tasklet has been
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disabled. Since mtk_wed_wo_queue_rx_clean and mtk_wed_wo_queue_refill
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routines can't run concurrently get rid of spinlock for mcu rx queue.
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Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
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Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
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Link: https://lore.kernel.org/r/36ec3b729542ea60898471d890796f745479ba32.1673342990.git.lorenzo@kernel.org
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Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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---
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--- a/drivers/net/ethernet/mediatek/mtk_wed_wo.c
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+++ b/drivers/net/ethernet/mediatek/mtk_wed_wo.c
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@@ -138,7 +138,6 @@ mtk_wed_wo_queue_refill(struct mtk_wed_w
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enum dma_data_direction dir = rx ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
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int n_buf = 0;
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- spin_lock_bh(&q->lock);
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while (q->queued < q->n_desc) {
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struct mtk_wed_wo_queue_entry *entry;
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dma_addr_t addr;
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@@ -172,7 +171,6 @@ mtk_wed_wo_queue_refill(struct mtk_wed_w
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q->queued++;
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n_buf++;
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}
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- spin_unlock_bh(&q->lock);
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return n_buf;
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}
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@@ -316,7 +314,6 @@ mtk_wed_wo_queue_rx_clean(struct mtk_wed
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{
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struct page *page;
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- spin_lock_bh(&q->lock);
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for (;;) {
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void *buf = mtk_wed_wo_dequeue(wo, q, NULL, true);
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@@ -325,7 +322,6 @@ mtk_wed_wo_queue_rx_clean(struct mtk_wed
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skb_free_frag(buf);
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}
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- spin_unlock_bh(&q->lock);
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if (!q->cache.va)
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return;
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