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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org,
        "Gustavo A. R. Silva" <gustavo@embeddedor.com>,
        Hans de Goede <hdegoede@redhat.com>,
        Sebastian Reichel <sebastian.reichel@collabora.com>
Subject: [PATCH 4.9 08/44] power: supply: axp288_charger: Fix unchecked return value
Date:   Mon, 20 May 2019 14:13:57 +0200
Message-Id: <20190520115232.016025272@linuxfoundation.org>
In-Reply-To: <20190520115230.720347034@linuxfoundation.org>
References: <20190520115230.720347034@linuxfoundation.org>
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From: Gustavo A. R. Silva <gustavo@embeddedor.com>

commit c3422ad5f84a66739ec6a37251ca27638c85b6be upstream.

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@vger.kernel.org
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/power/supply/axp288_charger.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/power/supply/axp288_charger.c
+++ b/drivers/power/supply/axp288_charger.c
@@ -899,6 +899,10 @@ static int axp288_charger_probe(struct p
 	/* 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,