[PATCH 1/2] watchdog/hpwdt: Only claim UNKNOWN NMI if from iLO

[Jerry Hoemann]

Do not claim NMIs that are not watchdog or ERRORs as it could
cause unnecessary crashes.

The code does this, but only for iLO5.

The intent was to preserve legacy (Gen8/9 and earlier) semantics of
using hpwdt for error containtment as hardware/firmware would signal
fatal IO errors as an NMI with the expectation of hpwdt crashing
the system.

But these IO errors should be received by hpwdt as an NMI_IO_CHECK.  So
the test is overly permissive and should not be limited to only ilo5.

This enables this protection for future iLO not matching current PCI IDs.

Fixes: 62290a5c194b ("watchdog: hpwdt: Claim NMIs generated by iLO5")
Signed-off-by: Jerry Hoemann <jerry.hoemann@xxxxxxx>
---
 drivers/watchdog/hpwdt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/watchdog/hpwdt.c b/drivers/watchdog/hpwdt.c
index f79f932bca14..79ed1626d8ea 100644
--- a/drivers/watchdog/hpwdt.c
+++ b/drivers/watchdog/hpwdt.c
@@ -178,7 +178,7 @@ static int hpwdt_pretimeout(unsigned int ulReason, struct pt_regs *regs)
 		"3. OA Forward Progress Log\n"
 		"4. iLO Event Log";
 
-	if (ilo5 && ulReason == NMI_UNKNOWN && !mynmi)
+	if (ulReason == NMI_UNKNOWN && !mynmi)
 		return NMI_DONE;
 
 	if (ilo5 && !pretimeout && !mynmi)
-- 
2.41.0