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authorKrzysztof Kozlowski <k.kozlowski@samsung.com>2014-10-15 16:25:09 +0200
committerSebastian Reichel <sre@kernel.org>2014-10-28 03:30:08 +0100
commit0eaf437aa14949d2230aeab7364f4ab47901304a (patch)
tree3d9355d15ac668f0e8422d528f444c8bc3d03094 /drivers/power
parent8000ebf76224a01adab9c1c16c341f54706292d5 (diff)
downloadblackbird-op-linux-0eaf437aa14949d2230aeab7364f4ab47901304a.tar.gz
blackbird-op-linux-0eaf437aa14949d2230aeab7364f4ab47901304a.zip
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: Krzysztof Kozlowski <k.kozlowski@samsung.com> Fixes: faffd234cf85 ("bq2415x_charger: Add DT support") Cc: <stable@vger.kernel.org> [small fix regarding the missing ti,usb-charger-detection info message] Signed-off-by: Sebastian Reichel <sre@kernel.org>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/bq2415x_charger.c11
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);
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