From: John Crispin <john-Pj+rj9U5foFAfugRpC6u6w@public.gmane.org>
To: "David S. Miller" <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
Cc: Sean Wang <keyhaede-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
John Crispin <john-Pj+rj9U5foFAfugRpC6u6w@public.gmane.org>,
Felix Fietkau <nbd-Vt+b4OUoWG0@public.gmane.org>
Subject: [PATCH 08/12] net: mediatek: fix threshold value
Date: Sun, 5 Jun 2016 08:33:01 +0200 [thread overview]
Message-ID: <1465108385-38286-9-git-send-email-john@phrozen.org> (raw)
In-Reply-To: <1465108385-38286-1-git-send-email-john-Pj+rj9U5foFAfugRpC6u6w@public.gmane.org>
The logic to calculate the threshold value for stopping the TX queue is
bad. Currently it will always use 1/2 of the rings size, which is way too
much. Set the threshold to MAX_SKB_FRAGS. This makes sure that the queue
is stopped when there is not enough room to accept an additional segment.
Signed-off-by: John Crispin <john@phrozen.org>
---
drivers/net/ethernet/mediatek/mtk_eth_soc.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index 93af4e3..8b289e1 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -1012,8 +1012,7 @@ static int mtk_tx_alloc(struct mtk_eth *eth)
atomic_set(&ring->free_count, MTK_DMA_SIZE - 2);
ring->next_free = &ring->dma[0];
ring->last_free = &ring->dma[MTK_DMA_SIZE - 2];
- ring->thresh = max((unsigned long)MTK_DMA_SIZE >> 2,
- MAX_SKB_FRAGS);
+ ring->thresh = MAX_SKB_FRAGS;
/* make sure that all changes to the dma ring are flushed before we
* continue
--
1.7.10.4
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next prev parent reply other threads:[~2016-06-05 6:33 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-05 6:32 [PATCH 00/12] net: mediatek: various small fixes John Crispin
2016-06-05 6:32 ` [PATCH 03/12] net: mediatek: fix missing free of scratch memory John Crispin
[not found] ` <1465108385-38286-1-git-send-email-john-Pj+rj9U5foFAfugRpC6u6w@public.gmane.org>
2016-06-05 6:32 ` [PATCH 01/12] net: mediatek: fix DQL support John Crispin
2016-06-05 7:32 ` David Miller
2016-06-06 6:43 ` John Crispin
2016-06-07 23:01 ` David Miller
2016-06-07 23:20 ` Tom Herbert
2016-06-05 6:32 ` [PATCH 02/12] net: mediatek: add missing return code check John Crispin
2016-06-05 6:32 ` [PATCH 04/12] net: mediatek: invalid buffer lookup in mtk_tx_map() John Crispin
2016-06-05 6:32 ` [PATCH 05/12] net: mediatek: dropped rx packets are not being counted properly John Crispin
2016-06-05 6:32 ` [PATCH 06/12] net: mediatek: add next data pointer coherency protection John Crispin
2016-06-05 6:33 ` [PATCH 07/12] net: mediatek: disable all interrupts during probe John Crispin
2016-06-05 6:33 ` John Crispin [this message]
2016-06-05 6:33 ` [PATCH 09/12] net: mediatek: increase watchdog_timeo John Crispin
2016-06-05 14:56 ` Andrew Lunn
2016-06-06 6:24 ` John Crispin
2016-06-06 12:21 ` Andrew Lunn
2016-06-06 12:38 ` John Crispin
2016-06-05 6:33 ` [PATCH 10/12] net: mediatek: fix off by one in the TX ring allocation John Crispin
2016-06-05 6:33 ` [PATCH 11/12] net: mediatek: only wake the queue if it is stopped John Crispin
2016-06-05 6:33 ` [PATCH 12/12] net: mediatek: remove superfluous queue wake up call John Crispin
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