30 lines
1.1 KiB
Diff
30 lines
1.1 KiB
Diff
From 286d47ba90315a871f77351f7f61b7e4a96476a9 Mon Sep 17 00:00:00 2001
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From: Ben Hutchings <bhutchings@solarflare.com>
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Date: Wed, 23 Dec 2009 13:49:13 +0000
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Subject: [PATCH 8/8] sfc: Disable TX descriptor prefetch watchdog
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This hardware watchdog can misfire, so it does more harm than good.
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Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/sfc/nic.c | 2 ++
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1 files changed, 2 insertions(+), 0 deletions(-)
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diff --git a/drivers/net/sfc/nic.c b/drivers/net/sfc/nic.c
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index a577be2..db44224 100644
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--- a/drivers/net/sfc/nic.c
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+++ b/drivers/net/sfc/nic.c
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@@ -1576,6 +1576,8 @@ void efx_nic_init_common(struct efx_nic *efx)
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EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_SOFT_EVT_EN, 1);
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/* Prefetch threshold 2 => fetch when descriptor cache half empty */
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EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_PREF_THRESHOLD, 2);
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+ /* Disable hardware watchdog which can misfire */
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+ EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_PREF_WD_TMR, 0x3fffff);
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/* Squash TX of packets of 16 bytes or less */
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if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0)
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EFX_SET_OWORD_FIELD(temp, FRF_BZ_TX_FLUSH_MIN_LEN_EN, 1);
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--
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1.6.5.7
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