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usb: gadget: r8a66597: Add missing null check on return from platform_get_resource

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[ Upstream commit 9c2076090c ]

The call to platform_get_resource can potentially return a NULL pointer
on failure, so add this check and return -EINVAL if it fails.

Fixes: c41442474a ("usb: gadget: R8A66597 peripheral controller support.")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Addresses-Coverity: ("Dereference null return")
Link: https://lore.kernel.org/r/20210406184510.433497-1-colin.king@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Colin Ian King 2021-04-06 19:45:10 +01:00 committed by Greg Kroah-Hartman
parent ce02e58ddf
commit e38a77c48a
1 changed files with 2 additions and 0 deletions
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2
drivers/usb/gadget/udc/r8a66597-udc.c
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@ -1849,6 +1849,8 @@ static int r8a66597_probe(struct platform_device *pdev)
return PTR_ERR(reg); return PTR_ERR(reg);
ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0); ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!ires)
return -EINVAL;
irq = ires->start; irq = ires->start;
irq_trigger = ires->flags & IRQF_TRIGGER_MASK; irq_trigger = ires->flags & IRQF_TRIGGER_MASK;