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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 <benh@kernel.crashing.org>
Acked-by: Stefan Roese <sr@denx.de>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
wifi-calibration
Benjamin Herrenschmidt 2007-12-05 11:14:27 +11:00 committed by Jeff Garzik
parent 8df4538e21
commit 968530643a
1 changed files with 3 additions and 1 deletions
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4
drivers/net/ibm_newemac/zmii.c
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@ -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);