scsi: megaraid_sas: Do not kill host bus adapter, if adapter is already dead

Link: https://lore.kernel.org/r/1579000882-20246-5-git-send-email-anand.lodnoor@broadcom.comSigned-off-by: NShivasharan S <shivasharan.srikanteshwara@broadcom.com>
Signed-off-by: NAnand Lodnoor <anand.lodnoor@broadcom.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/megaraid/megaraid_sas_base.c

@@ -2154,6 +2154,12 @@ static void megasas_complete_outstanding_ioctls(struct megasas_instance *instanc
 
 void megaraid_sas_kill_hba(struct megasas_instance *instance)
 {
+	if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR) {
+		dev_warn(&instance->pdev->dev,
+			 "Adapter already dead, skipping kill HBA\n");
+		return;
+	}
+
 	/* Set critical error to block I/O & ioctls in case caller didn't */
 	atomic_set(&instance->adprecovery, MEGASAS_HW_CRITICAL_ERROR);
 	/* Wait 1 second to ensure IO or ioctls in build have posted */