Re: [PATCH v2] watchdog: wdat_wdt: map registers that fall inside ACPI NVS

Guenter Roeck <[email protected]>
Newsgroups org.kernel.vger.linux-watchdog,org.kernel.vger.linux-kernel
Message-ID <[email protected]> 
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 <[email protected]>

Applied.

Thanks,
Guenter
lmpx.com only provides a reader for public news (NNTP) servers. It is not affiliated with the servers or forums shown here and is not responsible for the content of articles, which is written by their respective authors.