[PATCH 3/11] ibm_newemac: Fix ZMII refcounting bug

[PATCH 3/11] ibm_newemac: Fix ZMII refcounting bug

[Benjamin Herrenschmidt]

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>
---

 drivers/net/ibm_newemac/zmii.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Index: linux-work/drivers/net/ibm_newemac/zmii.c
===================================================================
--- linux-work.orig/drivers/net/ibm_newemac/zmii.c	2007-11-08 15:45:32.000000000 +1100
+++ linux-work/drivers/net/ibm_newemac/zmii.c	2007-11-08 15:46:21.000000000 +1100
@@ -83,12 +83,14 @@ int __devinit zmii_attach(struct of_devi
 
 	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);
 

[PATCH 0/11] ibm_newemac: Candidate patches for 2.6.25

[Benjamin Herrenschmidt]

Here are the patches I have pending for EMAC. With those, along with
some other powerpc patches scheduled for 2.6.25 for adding support
for those various boards, I have EMAC now working properly on a
variety of platforms, such as Taishan (440GX), Katmai (440SP),
EP405 (405GP), Bamboo (440EP), etc...

This serie apply on top of the patch:

"ibm_newemac: Fix possible lockup on close"

Which should be on its way to 2.6.24 already.

[PATCH 3/11] ibm_newemac: Fix ZMII refcounting bug

[Benjamin Herrenschmidt]

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>
---

 drivers/net/ibm_newemac/zmii.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Index: linux-work/drivers/net/ibm_newemac/zmii.c
===================================================================
--- linux-work.orig/drivers/net/ibm_newemac/zmii.c	2007-11-08 15:45:32.000000000 +1100
+++ linux-work/drivers/net/ibm_newemac/zmii.c	2007-11-08 15:46:21.000000000 +1100
@@ -83,12 +83,14 @@ int __devinit zmii_attach(struct of_devi
 
 	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);