From 286d47ba90315a871f77351f7f61b7e4a96476a9 Mon Sep 17 00:00:00 2001 From: Ben Hutchings Date: Wed, 23 Dec 2009 13:49:13 +0000 Subject: [PATCH] sfc: Disable TX descriptor prefetch watchdog This hardware watchdog can misfire, so it does more harm than good. Signed-off-by: Ben Hutchings Signed-off-by: David S. Miller --- drivers/net/sfc/nic.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/sfc/nic.c b/drivers/net/sfc/nic.c index a577be227862..db44224ed2ca 100644 --- a/drivers/net/sfc/nic.c +++ b/drivers/net/sfc/nic.c @@ -1576,6 +1576,8 @@ void efx_nic_init_common(struct efx_nic *efx) EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_SOFT_EVT_EN, 1); /* Prefetch threshold 2 => fetch when descriptor cache half empty */ EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_PREF_THRESHOLD, 2); + /* Disable hardware watchdog which can misfire */ + EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_PREF_WD_TMR, 0x3fffff); /* Squash TX of packets of 16 bytes or less */ if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0) EFX_SET_OWORD_FIELD(temp, FRF_BZ_TX_FLUSH_MIN_LEN_EN, 1);