Commit 0eaf437a authored by Krzysztof Kozlowski's avatar Krzysztof Kozlowski Committed by Sebastian Reichel

power: bq2415x_charger: Properly handle ENODEV from power_supply_get_by_phandle

The power_supply_get_by_phandle() on error returns ENODEV or NULL.
The driver later expects obtained pointer to power supply to be
valid or NULL. If it is not NULL then it dereferences it in
bq2415x_notifier_call() which would lead to dereferencing ENODEV-value
pointer.

Properly handle the power_supply_get_by_phandle() error case by
replacing error value with NULL. This indicates that usb charger
detection won't be used.

Fix also memory leak of 'name' if power_supply_get_by_phandle() fails
with NULL and probe should defer.
Signed-off-by: default avatarKrzysztof Kozlowski <k.kozlowski@samsung.com>
Fixes: faffd234 ("bq2415x_charger: Add DT support")
Cc: <stable@vger.kernel.org>
[small fix regarding the missing ti,usb-charger-detection info message]
Signed-off-by: default avatarSebastian Reichel <sre@kernel.org>
parent 8000ebf7
......@@ -1579,8 +1579,15 @@ static int bq2415x_probe(struct i2c_client *client,
if (np) {
bq->notify_psy = power_supply_get_by_phandle(np, "ti,usb-charger-detection");
if (!bq->notify_psy)
return -EPROBE_DEFER;
if (IS_ERR(bq->notify_psy)) {
dev_info(&client->dev,
"no 'ti,usb-charger-detection' property (err=%ld)\n",
PTR_ERR(bq->notify_psy));
bq->notify_psy = NULL;
} else if (!bq->notify_psy) {
ret = -EPROBE_DEFER;
goto error_2;
}
}
else if (pdata->notify_device)
bq->notify_psy = power_supply_get_by_name(pdata->notify_device);
......
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