From 9c2076090c2815fe7c49676df68dde7e60a9b9fc Mon Sep 17 00:00:00 2001
From: Colin Ian King <colin.king@canonical.com>
Date: Tue, 6 Apr 2021 19:45:10 +0100
Subject: [PATCH] usb: gadget: r8a66597: Add missing null check on return from platform_get_resource
Git-commit: 9c2076090c2815fe7c49676df68dde7e60a9b9fc
Patch-mainline: v5.13-rc1
References: git-fixes
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: c41442474a26 ("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>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
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;
--
2.26.2