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

[Colin King]

From: Colin Ian King <colin.k...@canonical.com>

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

Addresses-Coverity: ("Dereference null return")
Fixes: c41442474a26 ("usb: gadget: R8A66597 peripheral controller support.")
Signed-off-by: Colin Ian King <colin.k...@canonical.com>
---
 drivers/usb/gadget/udc/r8a66597-udc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/gadget/udc/r8a66597-udc.c 
b/drivers/usb/gadget/udc/r8a66597-udc.c
index 896c1a016d55..65cae4883454 100644
--- a/drivers/usb/gadget/udc/r8a66597-udc.c
+++ b/drivers/usb/gadget/udc/r8a66597-udc.c
@@ -1849,6 +1849,8 @@ static int r8a66597_probe(struct platform_device *pdev)
                return PTR_ERR(reg);
 
        ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+       if (!ires)
+               return -EINVAL;
        irq = ires->start;
        irq_trigger = ires->flags & IRQF_TRIGGER_MASK;
 
-- 
2.30.2