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via_wdt: fix critical boot hang due to unnamed resource allocation

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[ Upstream commit 7aa31ee9ec92915926e74731378c009c9cc04928 ]

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@kylinos.cn>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Li Qiang
2025-09-28 16:33:32 +08:00
committed by Greg Kroah-Hartman
parent b39fa02183
commit d2c7c90aca
1 changed files with 1 additions and 0 deletions
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1
drivers/watchdog/via_wdt.c
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@@ -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