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From: Hubert Feurstein <h.feurstein@gmail.com>
To: barebox@lists.infradead.org
Subject: [PATCH 2/2] net: fec_imx: ensure constant timeout in fec_halt
Date: Thu, 21 Feb 2013 17:13:40 +0100	[thread overview]
Message-ID: <1361463220-30166-2-git-send-email-h.feurstein@gmail.com> (raw)
In-Reply-To: <1361463220-30166-1-git-send-email-h.feurstein@gmail.com>

Signed-off-by: Hubert Feurstein <h.feurstein@gmail.com>
---
 drivers/net/fec_imx.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/net/fec_imx.c b/drivers/net/fec_imx.c
index 44a3112..14889d3 100644
--- a/drivers/net/fec_imx.c
+++ b/drivers/net/fec_imx.c
@@ -425,15 +425,20 @@ static int fec_open(struct eth_device *edev)
 static void fec_halt(struct eth_device *dev)
 {
 	struct fec_priv *fec = (struct fec_priv *)dev->priv;
-	int counter = 0xffff;
+	uint64_t tmo;
 
 	/* issue graceful stop command to the FEC transmitter if necessary */
 	writel(readl(fec->regs + FEC_X_CNTRL) | FEC_ECNTRL_RESET,
 			fec->regs + FEC_X_CNTRL);
 
 	/* wait for graceful stop to register */
-	while ((counter--) && (!(readl(fec->regs + FEC_IEVENT) & FEC_IEVENT_GRA)))
-		;	/* FIXME ensure time */
+	tmo = get_time_ns();
+	while (!(readl(fec->regs + FEC_IEVENT) & FEC_IEVENT_GRA)) {
+		if (is_timeout(tmo, 1 * SECOND)) {
+			dev_err(&dev->dev, "graceful stop timeout\n");
+			break;
+		}
+	}
 
 	/* Disable SmartDMA tasks */
 	fec_tx_task_disable(fec);
-- 
1.8.1.3


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  reply	other threads:[~2013-02-21 16:14 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-02-21 16:13 [PATCH 1/2] net: fec_imx: use dev_err and dev_warn instead of printf Hubert Feurstein
2013-02-21 16:13 ` Hubert Feurstein [this message]
2013-02-22  8:24 ` Sascha Hauer

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