Make sure to drop the reference taken by of_phy_find_device() when
registering and deregistering the fixed-link PHY-device.
Note that we need to put both references held at deregistration.
Fixes: 39b0c705195e ("net: dsa: Allow configuration of CPU & DSA port
speeds/duplex")
Signed-off-by: Johan Hovold <jo...@kernel.org>
---
Hi,
This is one has been compile tested only, but fixes a couple of leaks
similar to one that was found in the cpsw driver for which I just posted
a patch.
It turns out all drivers but DSA fail to deregister the fixed-link PHYs
registered by of_phy_register_fixed_link(). Due to the way this
interface was designed, deregistering such a PHY is a bit cumbersome and
looks like it would benefit from a common helper.
However, perhaps the interface should instead be changed so that the PHY
device is returned so that drivers do not need to use
of_phy_find_device() when they need to access properties of the fixed
link (e.g. as in dsu_cpu_dsa_setup below).
Thoughts?
Thanks,
Johan
net/dsa/dsa.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index a6902c1e2f28..798a6a776a5f 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -233,6 +233,8 @@ int dsa_cpu_dsa_setup(struct dsa_switch *ds, struct device
*dev,
genphy_read_status(phydev);
if (ds->ops->adjust_link)
ds->ops->adjust_link(ds, port, phydev);
+
+ phy_device_free(phydev); /* of_phy_find_device */
}
return 0;
@@ -509,8 +511,12 @@ void dsa_cpu_dsa_destroy(struct device_node *port_dn)
if (of_phy_is_fixed_link(port_dn)) {
phydev = of_phy_find_device(port_dn);
if (phydev) {
- phy_device_free(phydev);
fixed_phy_unregister(phydev);
+ /* Put references taken by of_phy_find_device() and
+ * of_phy_register_fixed_link().
+ */
+ phy_device_free(phydev);
+ phy_device_free(phydev);
}
}
}
--
2.7.3
