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| author | Krzysztof Kozlowski <k.kozlowski@samsung.com> | 2014-10-15 16:25:09 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-11-21 09:23:03 -0800 |
| commit | 169aa821d1a3694d488c39f748b903e5084095bf (patch) | |
| tree | 98a0f0513ff58972078d4f9f1eb59d8c0606f2ea /drivers | |
| parent | 1f863a274f70ce2f4bd467e4d090a396dfdbd5e5 (diff) | |
| download | lwn-169aa821d1a3694d488c39f748b903e5084095bf.tar.gz lwn-169aa821d1a3694d488c39f748b903e5084095bf.zip | |
power: bq2415x_charger: Properly handle ENODEV from power_supply_get_by_phandle
commit 0eaf437aa14949d2230aeab7364f4ab47901304a upstream.
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: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Fixes: faffd234cf85 ("bq2415x_charger: Add DT support")
[small fix regarding the missing ti,usb-charger-detection info message]
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/power/bq2415x_charger.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/power/bq2415x_charger.c b/drivers/power/bq2415x_charger.c index e384844a1ae1..260795c6901a 100644 --- a/drivers/power/bq2415x_charger.c +++ b/drivers/power/bq2415x_charger.c @@ -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); |