Commit b7d3e3d3 authored by David Daney's avatar David Daney Committed by David S. Miller
Browse files

net: thunderx: Don't leak phy device references on -EPROBE_DEFER condition.



It is possible, although unlikely, that probing will find the
phy_device for the first LMAC of a thunder BGX device, but then need
to fail with -EPROBE_DEFER on a subsequent LMAC.  In this case, we
need to call put_device() on each of the phy_devices that were
obtained, but will be unused due to returning -EPROBE_DEFER.

Also, since we can break out of the probing loop early, we need to
explicitly call of_node_put() outside of the loop.
Signed-off-by: default avatarDavid Daney <david.daney@cavium.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9277a4f8
......@@ -974,17 +974,18 @@ static int bgx_init_acpi_phy(struct bgx *bgx)
static int bgx_init_of_phy(struct bgx *bgx)
{
struct fwnode_handle *fwn;
struct device_node *node = NULL;
u8 lmac = 0;
const char *mac;
device_for_each_child_node(&bgx->pdev->dev, fwn) {
struct phy_device *pd;
struct device_node *phy_np;
struct device_node *node = to_of_node(fwn);
const char *mac;
/* Should always be an OF node. But if it is not, we
* cannot handle it, so exit the loop.
*/
node = to_of_node(fwn);
if (!node)
break;
......@@ -1005,17 +1006,30 @@ static int bgx_init_of_phy(struct bgx *bgx)
/* Wait until the phy drivers are available */
pd = of_phy_find_device(phy_np);
if (!pd)
return -EPROBE_DEFER;
goto defer;
bgx->lmac[lmac].phydev = pd;
}
lmac++;
if (lmac == MAX_LMAC_PER_BGX) {
of_node_put(node);
if (lmac == MAX_LMAC_PER_BGX)
break;
}
}
of_node_put(node);
return 0;
defer:
/* We are bailing out, try not to leak device reference counts
* for phy devices we may have already found.
*/
while (lmac) {
if (bgx->lmac[lmac].phydev) {
put_device(&bgx->lmac[lmac].phydev->mdio.dev);
bgx->lmac[lmac].phydev = NULL;
}
lmac--;
}
of_node_put(node);
return -EPROBE_DEFER;
}
#else
......
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