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Message-Id: <1233710223-17808-2-git-send-email-afleming@freescale.com> Date: Tue, 3 Feb 2009 19:17:00 -0600 From: Andy Fleming <afleming@...escale.com> To: davem@...emloft.net, jeff@...zik.org Cc: netdev@...r.kernel.org, Andy Fleming <afleming@...escale.com> Subject: [PATCH v2.6.29 2/2] 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@...escale.com> --- drivers/net/gianfar.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c index 3f7eab4..acae2d8 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); -- 1.5.4.GIT -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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