[Skiboot] [PATCH] opal/hmi: Initialize the hmi event with old value of TFMR.

[Mahesh Salgaonkar]

Do this before we fix TFAC errors. Otherwise the event at host console
shows no thread error reported in TFMR register.

Without this patch the console event show TFMR with no thread error:
(DEC parity error TFMR[59] injection)

[   53.737572] Severe Hypervisor Maintenance interrupt [Recovered]
[   53.737596]  Error detail: Timer facility experienced an error
[   53.737611] 	HMER: 0840000000000000
[   53.737621] 	TFMR: 3212000870e04000

After this patch it shows old TFMR value on host console:

[ 2302.267271] Severe Hypervisor Maintenance interrupt [Recovered]
[ 2302.267305]  Error detail: Timer facility experienced an error
[ 2302.267320] 	HMER: 0840000000000000
[ 2302.267330] 	TFMR: 3212000870e14010

Fixes: 674f7696f ("opal/hmi: Rework HMI handling of TFAC errors")
Cc: skiboot-stable at lists.ozlabs.org
Signed-off-by: Mahesh Salgaonkar <mahesh at linux.vnet.ibm.com>
---
 core/hmi.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/core/hmi.c b/core/hmi.c
index fbb182c32..6ad71a9e8 100644
--- a/core/hmi.c
+++ b/core/hmi.c
@@ -1156,6 +1156,9 @@ static int handle_tfac_errors(struct OpalHMIEvent *hmi_evt, uint64_t *out_flags)
 	int recover = -1;
 	uint64_t tfmr = mfspr(SPR_TFMR);
 
+	/* Initialize the hmi event with old value of TFMR */
+	hmi_evt->tfmr = tfmr;
+
 	/* A TFMR parity/corrupt error makes us ignore all the local stuff.*/
 	if (tfmr & SPR_TFMR_TFMR_CORRUPT) {
 		/* Mark TB as invalid for now as we don't trust TFMR, we'll fix
@@ -1216,7 +1219,6 @@ static int handle_tfac_errors(struct OpalHMIEvent *hmi_evt, uint64_t *out_flags)
 	if (recover != -1 && hmi_evt) {
 		hmi_evt->severity = OpalHMI_SEV_ERROR_SYNC;
 		hmi_evt->type = OpalHMI_ERROR_TFAC;
-		hmi_evt->tfmr = tfmr;
 		queue_hmi_event(hmi_evt, recover, out_flags);
 	}