From b98ac702f49042ab0c382b839465b95a2bd0cd65 Mon Sep 17 00:00:00 2001 From: Andy Fleming Date: Wed, 4 Feb 2009 16:38:05 -0800 Subject: gianfar: Fix potential soft reset race SOFT_RESET must be asserted for at least 3 TX clocks in order for it to work properly. The syncs in the gfar_write() commands have been hiding this, but we need to guarantee it. Signed-off-by: Andy Fleming Signed-off-by: David S. Miller --- drivers/net/gianfar.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/net/gianfar.c') diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c index 3f7eab42aef1..acae2d8cd688 100644 --- a/drivers/net/gianfar.c +++ b/drivers/net/gianfar.c @@ -351,6 +351,9 @@ static int gfar_probe(struct of_device *ofdev, /* Reset MAC layer */ gfar_write(&priv->regs->maccfg1, MACCFG1_SOFT_RESET); + /* We need to delay at least 3 TX clocks */ + udelay(2); + tempval = (MACCFG1_TX_FLOW | MACCFG1_RX_FLOW); gfar_write(&priv->regs->maccfg1, tempval); -- cgit v1.2.3-59-g8ed1b