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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 <afleming@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andy Fleming 2009-02-04 16:38:05 -08:00 committed by David S. Miller
parent 1fbe49328f
commit b98ac702f4
1 changed files with 3 additions and 0 deletions
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3
drivers/net/gianfar.c
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@ -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);