Tell the controller to NMI when the controller deadlocks.
Reviewed-by: Scott Benesh <[email protected]>
Reviewed-by: Scott Teel <[email protected]>
Reviewed-by: Kevin Barnett <[email protected]>
Signed-off-by: Don Brace <[email protected]>
---
drivers/scsi/hpsa.c | 6 ++++++
drivers/scsi/hpsa_cmd.h | 1 +
2 files changed, 7 insertions(+)
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 798fb20..9fb739c 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -8451,6 +8451,12 @@ static void controller_lockup_detected(struct ctlr_info
*h)
"lockup detected after %d but scratchpad register is
zero\n",
h->heartbeat_sample_interval / HZ);
lockup_detected = 0xffffffff;
+ } else if (lockup_detected == 0xffff0000) {
+ /*
+ * Ring controller NMI doorbell
+ */
+ dev_warn(&h->pdev->dev, "Telling controller to do an NMI\n");
+ writel(DOORBELL_GENERATE_NMI, h->vaddr + SA5_DOORBELL);
}
set_lockup_detected_for_all_cpus(h, lockup_detected);
spin_unlock_irqrestore(&h->lock, flags);
diff --git a/drivers/scsi/hpsa_cmd.h b/drivers/scsi/hpsa_cmd.h
index a584cdf..d186f80 100644
--- a/drivers/scsi/hpsa_cmd.h
+++ b/drivers/scsi/hpsa_cmd.h
@@ -142,6 +142,7 @@
#define DOORBELL_CTLR_RESET 0x00000004l
#define DOORBELL_CTLR_RESET2 0x00000020l
#define DOORBELL_CLEAR_EVENTS 0x00000040l
+#define DOORBELL_GENERATE_NMI 0x00000080l
#define CFGTBL_Trans_Simple 0x00000002l
#define CFGTBL_Trans_Performant 0x00000004l
--
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