linux-kernel - [PATCH 4.8 078/125] power: bq24257: Fix use of uninitialized pointer bq->charger

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Date:   Sat, 29 Oct 2016 09:49:56 -0400
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Georges Savoundararadj <savoundg@...il.com>,
        Aurelien Chanot <chanot.a@...il.com>,
        Andreas Dannenberg <dannenberg@...com>,
        Sebastian Reichel <sre@...nel.org>,
        David Woodhouse <dwmw2@...radead.org>
Subject: [PATCH 4.8 078/125] power: bq24257: Fix use of uninitialized pointer bq->charger

4.8-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Georges Savoundararadj <savoundg@...il.com>

commit 0610735928ee47870e083d5901caa371089216f1 upstream.

bq->charger is initialized in bq24257_power_supply_init.
Therefore, bq24257_power_supply_init should be called before the
registration of the IRQ handler bq24257_irq_handler_thread that calls
power_supply_changed(bq->charger).

Signed-off-by: Georges Savoundararadj <savoundg@...il.com>
Cc: Aurelien Chanot <chanot.a@...il.com>
Cc: Andreas Dannenberg <dannenberg@...com>
Cc: Sebastian Reichel <sre@...nel.org>
Cc: David Woodhouse <dwmw2@...radead.org>
Fixes: 2219a935963e ("power_supply: Add TI BQ24257 charger driver")
Signed-off-by: Sebastian Reichel <sre@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/power/bq24257_charger.c |   12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

--- a/drivers/power/bq24257_charger.c
+++ b/drivers/power/bq24257_charger.c
@@ -1068,6 +1068,12 @@ static int bq24257_probe(struct i2c_clie
 		return ret;
 	}
 
+	ret = bq24257_power_supply_init(bq);
+	if (ret < 0) {
+		dev_err(dev, "Failed to register power supply\n");
+		return ret;
+	}
+
 	ret = devm_request_threaded_irq(dev, client->irq, NULL,
 					bq24257_irq_handler_thread,
 					IRQF_TRIGGER_FALLING |
@@ -1078,12 +1084,6 @@ static int bq24257_probe(struct i2c_clie
 		return ret;
 	}
 
-	ret = bq24257_power_supply_init(bq);
-	if (ret < 0) {
-		dev_err(dev, "Failed to register power supply\n");
-		return ret;
-	}
-
 	ret = sysfs_create_group(&bq->charger->dev.kobj, &bq24257_attr_group);
 	if (ret < 0) {
 		dev_err(dev, "Can't create sysfs entries\n");