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86bc29e4a8
[mac80211] ca5ee6e mac80211: Fix potential endless loop 2c14710 mac80211: add more AQL fixes/improvements 91fb3ce mac80211: remove an obsolete patch that is no longer doing anything useful acf1733 mac80211: add preliminary support for enabling 802.11ax in config d717343 mac80211: update encap offload patches to the latest version 673062f mac80211: allow bigger A-MSDU sizes in VHT, even if HT is limited caf7277 mac80211: do not allow bigger VHT MPDUs than the hardware supports cd36c0d mac80211: select the first available channel for 5GHz interfaces 1c6d456 mac80211: fix regression in station connection monitor optimization 4bd7689 mac80211: update sta connection monitor regression fix [target] Sync: at91, ath25, ath79, lantiq, mediatek, mvebu.
27 lines
872 B
Diff
27 lines
872 B
Diff
From: Felix Fietkau <nbd@nbd.name>
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Date: Mon, 8 Jun 2020 17:02:39 +0200
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Subject: [PATCH] net: ethernet: mtk_eth_soc: significantly reduce mdio bus
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access latency
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usleep_range often ends up sleeping much longer than the 10-20us provided
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as a range here. This causes significant latency in mdio bus acceses,
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which easily adds multiple seconds to the boot time on MT7621 when polling
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DSA slave ports.
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Use cond_resched instead of usleep_range, since the MDIO access does not
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take much time
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
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+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
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@@ -85,7 +85,7 @@ static int mtk_mdio_busy_wait(struct mtk
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return 0;
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if (time_after(jiffies, t_start + PHY_IAC_TIMEOUT))
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break;
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- usleep_range(10, 20);
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+ cond_resched();
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}
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dev_err(eth->dev, "mdio: MDIO timeout\n");
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