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From: Sascha Hauer <s.hauer@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH 4/9] net: phy: check if a phy already has an ethernet device
Date: Wed, 11 Dec 2013 12:41:12 +0100	[thread overview]
Message-ID: <1386762077-23205-5-git-send-email-s.hauer@pengutronix.de> (raw)
In-Reply-To: <1386762077-23205-1-git-send-email-s.hauer@pengutronix.de>

If during a phy_device_connect a phy already has an ehternet device
this can only mean it's already attached to another device. return -EBUSY
in this case.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/net/phy/phy.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index fb4cb11..37f6647 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -281,6 +281,9 @@ int phy_device_connect(struct eth_device *edev, struct mii_bus *bus, int addr,
 		}
 	}
 
+	if (dev->attached_dev)
+		return -EBUSY;
+
 	dev->interface = interface;
 	dev->dev_flags = flags;
 
-- 
1.8.5.1


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  parent reply	other threads:[~2013-12-11 11:41 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-12-11 11:41 mii patches Sascha Hauer
2013-12-11 11:41 ` [PATCH 1/9] net: phy: cleanup attached device handling Sascha Hauer
2013-12-11 11:41 ` [PATCH 2/9] net: phy: bail out early in phy_device_connect Sascha Hauer
2013-12-11 11:41 ` [PATCH 3/9] net: phy: move duplicated code out of if/else Sascha Hauer
2013-12-11 11:41 ` Sascha Hauer [this message]
2013-12-11 11:41 ` [PATCH 5/9] net: phy: track registered state of a phy device Sascha Hauer
2013-12-11 11:41 ` [PATCH 6/9] net: phy: move phy_init_hw to phy_device_connect Sascha Hauer
2013-12-11 11:41 ` [PATCH 7/9] net: phy: Track mii buses on a list Sascha Hauer
2013-12-11 11:41 ` [PATCH 8/9] net: phy: implement detect callback for miibus devices Sascha Hauer
2013-12-11 11:41 ` [PATCH 9/9] miitool: Add option to scan mii buses Sascha Hauer

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