From: Jan Kiszka <jan.kis...@siemens.com>
Linux won't use a disabled WDAT watchdog either.
Signed-off-by: Jan Kiszka <jan.kis...@siemens.com>
---
drivers/watchdog/wdat.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/watchdog/wdat.c b/drivers/watchdog/wdat.c
index f5cb5e4..0875a50 100644
--- a/drivers/watchdog/wdat.c
+++ b/drivers/watchdog/wdat.c
@@ -33,6 +33,8 @@
#define ACPI_SIG_XSDT (CHAR8 *)"XSDT"
#define ACPI_SIG_WDAT (CHAR8 *)"WDAT"
+#define ACPI_WDAT_ENABLED 1
+
#pragma pack(1)
/* --------------------------------------------------------------------------
@@ -437,6 +439,9 @@ static EFI_STATUS init(EFI_PCI_IO __attribute__((unused)) *
pci_io,
if (EFI_ERROR(status)) {
return status;
}
+ if (!(wdat_table->flags & ACPI_WDAT_ENABLED)) {
+ return EFI_UNSUPPORTED;
+ }
INFO(L"Detected WDAT watchdog\n");
/* Check if the boot was caused by the watchdog */
--
2.43.0
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