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From: Guenter Roeck <linux@roeck-us.net>
To: "Renê de Souza Pinto" <rene@renesp.com.br>
Cc: Wim Van Sebroeck <wim@linux-watchdog.org>,
	"open list:WATCHDOG DEVICE DRIVERS"
	<linux-watchdog@vger.kernel.org>,
	open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2] watchdog: wdat_wdt: map registers that fall inside ACPI NVS
Date: Thu, 6 Aug 2026 14:27:13 -0700	[thread overview]
Message-ID: <671d52f2-c22f-46dd-84cd-95b2dc6d52cd@roeck-us.net> (raw)
In-Reply-To: <20260804103958.3684195-1-rene@renesp.com.br>

On Tue, Aug 04, 2026 at 12:39:57PM +0200, Renê de Souza Pinto wrote:
> Some firmwares describe WDAT registers inside memory ranges marked as
> ACPI NVS in the E820 map, failing with -EBUSY during probe, leaving the
> hardware watchdog unserviced and triggering periodic system resets.
> 
> This issue was observed on a OnLogic Karbon 524 device (when watchdog is
> enabled in BIOS):
> 
> wdat_wdt wdat_wdt: error -EBUSY: can't request region for resource [mem 0x63df7a98]
> wdat_wdt wdat_wdt: probe with driver wdat_wdt failed with error -16
> 
> Check whether the region falls inside ACPI NVS before requesting it and,
> if so, map it without reservation.
> 
> Signed-off-by: Renê de Souza Pinto <rene@renesp.com.br>

Applied.

Thanks,
Guenter

      reply	other threads:[~2026-08-06 21:27 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-08-04  9:23 [PATCH] watchdog: wdat_wdt: map registers that fall inside ACPI NVS Renê de Souza Pinto
2026-08-04  9:40 ` sashiko-bot
2026-08-04 10:39 ` [PATCH v2] " Renê de Souza Pinto
2026-08-06 21:27   ` Guenter Roeck [this message]

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