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| author | Johan Hovold <johan@kernel.org> | 2018-08-27 10:21:53 +0200 |
|---|---|---|
| committer | Rob Herring <robh@kernel.org> | 2018-10-23 13:28:53 -0500 |
| commit | 9844fb2e351311210e6660a9a1c62d17424a6145 (patch) | |
| tree | 802a7f3c566481a4e46a32b4adecbec2a7b1805f /drivers/power | |
| parent | 5bf59773aaf36dd62117dc83d50e1bbf9ef432da (diff) | |
| download | linux-9844fb2e351311210e6660a9a1c62d17424a6145.tar.gz linux-9844fb2e351311210e6660a9a1c62d17424a6145.tar.bz2 linux-9844fb2e351311210e6660a9a1c62d17424a6145.zip | |
power: supply: twl4030-charger: fix OF sibling-node lookup
Use the new of_get_compatible_child() helper to lookup the usb sibling
node instead of using of_find_compatible_node(), which searches the
entire tree from a given start node and thus can return an unrelated
(non-sibling) node.
This also addresses a potential use-after-free (e.g. after probe
deferral) as the tree-wide helper drops a reference to its first
argument (i.e. the parent device node).
While at it, also fix the related phy-node reference leak.
Fixes: f5e4edb8c888 ("power: twl4030_charger: find associated phy by more reliable means.")
Cc: stable <stable@vger.kernel.org> # 4.2
Cc: NeilBrown <neilb@suse.de>
Cc: Felipe Balbi <felipe.balbi@linux.intel.com>
Cc: Sebastian Reichel <sre@kernel.org>
Reviewed-by: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/supply/twl4030_charger.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/power/supply/twl4030_charger.c b/drivers/power/supply/twl4030_charger.c index bbcaee56db9d..b6a7d9f74cf3 100644 --- a/drivers/power/supply/twl4030_charger.c +++ b/drivers/power/supply/twl4030_charger.c @@ -996,12 +996,13 @@ static int twl4030_bci_probe(struct platform_device *pdev) if (bci->dev->of_node) { struct device_node *phynode; - phynode = of_find_compatible_node(bci->dev->of_node->parent, - NULL, "ti,twl4030-usb"); + phynode = of_get_compatible_child(bci->dev->of_node->parent, + "ti,twl4030-usb"); if (phynode) { bci->usb_nb.notifier_call = twl4030_bci_usb_ncb; bci->transceiver = devm_usb_get_phy_by_node( bci->dev, phynode, &bci->usb_nb); + of_node_put(phynode); if (IS_ERR(bci->transceiver)) { ret = PTR_ERR(bci->transceiver); if (ret == -EPROBE_DEFER) |