ipmi:si: Use a long timeout when the BMC is misbehaving

If the driver goes into HOSED state, don't reset the timeout to the
short timeout in the timeout handler.

Reported-by: Igor Raits <[email protected]>
Closes: https://lore.kernel.org/linux-acpi/CAK8fFZ58fidGUCHi5WFX0uoTPzveUUDzT=k=AAm4yWo3bAuCFg@mail.gmail.com/
Fixes: bc3a9d2 ("ipmi:si: Gracefully handle if the BMC is non-functional")
Cc: [email protected] # 4.18
Signed-off-by: Corey Minyard <[email protected]>

Author: cminyard

drivers/char/ipmi/ipmi_si_intf.c

@@ -1119,7 +1119,9 @@ static void smi_timeout(struct timer_list *t)
 		     * SI_USEC_PER_JIFFY);
 	smi_result = smi_event_handler(smi_info, time_diff);
 
-	if ((smi_info->io.irq) && (!smi_info->interrupt_disabled)) {
+	if (smi_info->si_state == SI_HOSED) {
+		timeout = jiffies + SI_TIMEOUT_HOSED;
+	} else if ((smi_info->io.irq) && (!smi_info->interrupt_disabled)) {
 		/* Running with interrupts, only do long timeouts. */
 		timeout = jiffies + SI_TIMEOUT_JIFFIES;
 		smi_inc_stat(smi_info, long_timeouts);