linux-kernel - [PATCH] power: supply: axp288_charger: Fix unchecked return value

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Message-ID: <20190318161439.GA6245@embeddedor>
Date:   Mon, 18 Mar 2019 11:14:39 -0500
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Sebastian Reichel <sre@...nel.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Ramakrishna Pallala <ramakrishna.pallala@...el.com>
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Subject: [PATCH] power: supply: axp288_charger: Fix unchecked return value

Currently there is no check on platform_get_irq() return value
in case it fails, hence never actually reporting any errors and
causing unexpected behavior when using such value as argument
for function regmap_irq_get_virq().

Fix this by adding a proper check, a message reporting any errors
and returning *pirq*

Addresses-Coverity-ID: 1443940 ("Improper use of negative value")
Fixes: 843735b788a4 ("power: axp288_charger: axp288 charger driver")
Cc: stable@...r.kernel.org
Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
---
 drivers/power/supply/axp288_charger.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/power/supply/axp288_charger.c b/drivers/power/supply/axp288_charger.c
index f8c6da9277b3..00b961890a38 100644
--- a/drivers/power/supply/axp288_charger.c
+++ b/drivers/power/supply/axp288_charger.c
@@ -833,6 +833,10 @@ static int axp288_charger_probe(struct platform_device *pdev)
 	/* Register charger interrupts */
 	for (i = 0; i < CHRG_INTR_END; i++) {
 		pirq = platform_get_irq(info->pdev, i);
+		if (pirq < 0) {
+			dev_err(&pdev->dev, "Failed to get IRQ: %d\n", pirq);
+			return pirq;
+		}
 		info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq);
 		if (info->irq[i] < 0) {
 			dev_warn(&info->pdev->dev,
-- 
2.21.0