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Subject[PATCH 5.0 124/146] usb: typec: Fix unchecked return value
Date
5.0-stable review patch.  If anyone has any objections, please let me know.

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

From: Gustavo A. R. Silva <gustavo@embeddedor.com>

commit e82adc1074a7356f1158233551df9e86b7ebfb82 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 error and return
*irq* in case platform_get_irq() fails.

Addresses-Coverity-ID: 1443899 ("Improper use of negative value")
Fixes: d2061f9cc32d ("usb: typec: add driver for Intel Whiskey Cove PMIC USB Type-C PHY")
Cc: stable@vger.kernel.org
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/usb/typec/tcpm/wcove.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)

--- a/drivers/usb/typec/tcpm/wcove.c
+++ b/drivers/usb/typec/tcpm/wcove.c
@@ -615,8 +615,13 @@ static int wcove_typec_probe(struct plat
wcove->dev = &pdev->dev;
wcove->regmap = pmic->regmap;

- irq = regmap_irq_get_virq(pmic->irq_chip_data_chgr,
- platform_get_irq(pdev, 0));
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "Failed to get IRQ: %d\n", irq);
+ return irq;
+ }
+
+ irq = regmap_irq_get_virq(pmic->irq_chip_data_chgr, irq);
if (irq < 0)
return irq;


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