On Tue, Sep 13, 2016 at 06:23:34PM +0300, Mika Westerberg wrote: > ACPI WDAT table is the preferred way to use hardware watchdog over the > native iTCO_wdt. Windows only uses this table for its hardware watchdog > implementation so we should be relatively safe to trust it has been > validated by OEMs > > Prevent iTCO watchdog creation if we detect that there is ACPI WDAT table. > > Signed-off-by: Mika Westerberg <mika.westerb...@linux.intel.com>
Reviewed-by: Guenter Roeck <li...@roeck-us.net> > --- > drivers/mfd/lpc_ich.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/mfd/lpc_ich.c b/drivers/mfd/lpc_ich.c > index bd3aa4578346..c8dee47b45d9 100644 > --- a/drivers/mfd/lpc_ich.c > +++ b/drivers/mfd/lpc_ich.c > @@ -984,6 +984,10 @@ static int lpc_ich_init_wdt(struct pci_dev *dev) > int ret; > struct resource *res; > > + /* If we have ACPI based watchdog use that instead */ > + if (acpi_has_watchdog()) > + return -ENODEV; > + > /* Setup power management base register */ > pci_read_config_dword(dev, priv->abase, &base_addr_cfg); > base_addr = base_addr_cfg & 0x0000ff80; > -- > 2.9.3 >
