[PATCH 4.4 21/29] power: supply: axp288_charger: Fix unchecked return value

From: Greg Kroah-Hartman
Date: Sat Apr 11 2020 - 08:29:02 EST


From: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>

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@xxxxxxxxxxxxxxx
Signed-off-by: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>
Reviewed-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Signed-off-by: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Nobuhiro Iwamatsu (CIP) <nobuhiro1.iwamatsu@xxxxxxxxxxxxx>

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

--- a/drivers/power/axp288_charger.c
+++ b/drivers/power/axp288_charger.c
@@ -883,6 +883,10 @@ 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,