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usb: typec: 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 error and return
*irq* in case platform_get_irq() fails.

Addresses-Coverity-ID: 1443899 ("Improper use of negative value")
Fixes: d2061f9cc3 ("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>
This commit is contained in:
Gustavo A. R. Silva 2019-03-18 16:18:30 -05:00 committed by Greg Kroah-Hartman
parent 9e98c678c2
commit e82adc1074
1 changed files with 7 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/usb/typec/tcpm/wcove.c
View File

@ -615,8 +615,13 @@ static int wcove_typec_probe(struct platform_device *pdev)
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;