From 968530643a0685caced9dfd6f72f20d5e7bc8fbb Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Wed, 5 Dec 2007 11:14:27 +1100 Subject: ibm_newemac: Fix ZMII refcounting bug When using ZMII for MDIO only (such as 440GX with RGMII for data and ZMII for MDIO), the ZMII code would fail to properly refcount, thus triggering a BUG_ON(). Signed-off-by: Benjamin Herrenschmidt Acked-by: Stefan Roese Signed-off-by: Jeff Garzik --- drivers/net/ibm_newemac/zmii.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'drivers/net/ibm_newemac/zmii.c') diff --git a/drivers/net/ibm_newemac/zmii.c b/drivers/net/ibm_newemac/zmii.c index 2219ec2740e..0f8cfbc0c61 100644 --- a/drivers/net/ibm_newemac/zmii.c +++ b/drivers/net/ibm_newemac/zmii.c @@ -83,12 +83,14 @@ int __devinit zmii_attach(struct of_device *ofdev, int input, int *mode) ZMII_DBG(dev, "init(%d, %d)" NL, input, *mode); - if (!zmii_valid_mode(*mode)) + if (!zmii_valid_mode(*mode)) { /* Probably an EMAC connected to RGMII, * but it still may need ZMII for MDIO so * we don't fail here. */ + dev->users++; return 0; + } mutex_lock(&dev->lock); -- cgit v1.2.3