watchdog: iTCO_wdt: Fix detection of SMI-off case

Obviously, the test needs to run against the register content, not its
address.

Fixes: cb01104 ("watchdog: iTCO_wdt: Account for rebooting on second timeout")
Cc: [email protected]
Reported-by: Mantas Mikulėnas <[email protected]>
Signed-off-by: Jan Kiszka <[email protected]>
Reviewed-by: Paolo Bonzini <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
Tested-by: Mantas Mikulėnas <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>
Signed-off-by: Wim Van Sebroeck <[email protected]>

Author: jan-kiszka

drivers/watchdog/iTCO_wdt.c

@@ -362,7 +362,7 @@ static int iTCO_wdt_set_timeout(struct watchdog_device *wd_dev, unsigned int t)
 	 * Otherwise, the BIOS generally reboots when the SMI triggers.
 	 */
 	if (p->smi_res &&
-	    (SMI_EN(p) & (TCO_EN | GBL_SMI_EN)) != (TCO_EN | GBL_SMI_EN))
+	    (inl(SMI_EN(p)) & (TCO_EN | GBL_SMI_EN)) != (TCO_EN | GBL_SMI_EN))
 		tmrval /= 2;
 
 	/* from the specs: */