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net: core: recursively find netdev by device node 

The assumption that a device node is associated either with the
netdev's device, or the parent of that device, does not hold for all
drivers. E.g. Freescale's DPAA has two layers of platform devices
above the netdev. Instead, recursively walk up the tree from the
netdev, allowing any parent to match against the sought after node.

Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tobias Waldekranz 2020-05-15 11:52:52 +02:00 committed by David S. Miller
parent d00f26b623
commit 2e186a2cf8
1 changed files with 5 additions and 5 deletions
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10
net/core/net-sysfs.c
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@ -1805,12 +1805,12 @@ static struct class net_class __ro_after_init = {
#ifdef CONFIG_OF_NET
static int of_dev_node_match(struct device *dev, const void *data)
{
int ret = 0;
for (; dev; dev = dev->parent) {
if (dev->of_node == data)
return 1;
}
if (dev->parent)
ret = dev->parent->of_node == data;
return ret == 0 ? dev->of_node == data : ret;
return 0;
}
/*