linux-kernel - [PATCH] via_wdt: fix critical boot hang due to unnamed resource allocation

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Message-Id: <20250928083332.3035370-1-liqiang01@kylinos.cn>
Date: Sun, 28 Sep 2025 16:33:32 +0800
From: Li Qiang <liqiang01@...inos.cn>
To: wim@...ux-watchdog.org,
	linux@...ck-us.net
Cc: linux-watchdog@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Li Qiang <liqiang01@...inos.cn>
Subject: [PATCH] via_wdt: fix critical boot hang due to unnamed resource allocation

The VIA watchdog driver uses allocate_resource() to reserve a MMIO
region for the watchdog control register. However, the allocated
resource was not given a name, which causes the kernel resource tree
to contain an entry marked as "<BAD>" under /proc/iomem on x86
platforms.

During boot, this unnamed resource can lead to a critical hang because
subsequent resource lookups and conflict checks fail to handle the
invalid entry properly.

Signed-off-by: Li Qiang <liqiang01@...inos.cn>
---
 drivers/watchdog/via_wdt.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/watchdog/via_wdt.c b/drivers/watchdog/via_wdt.c
index d647923d68fe..f55576392651 100644
--- a/drivers/watchdog/via_wdt.c
+++ b/drivers/watchdog/via_wdt.c
@@ -165,6 +165,7 @@ static int wdt_probe(struct pci_dev *pdev,
 		dev_err(&pdev->dev, "cannot enable PCI device\n");
 		return -ENODEV;
 	}
+	wdt_res.name = "via_wdt";

 	/*
 	 * Allocate a MMIO region which contains watchdog control register
-- 
2.25.1