[PATCH 5/6] powerpc/eeh: Refactor the output message

[Gavin Shan]

We needn't the the whole backtrace other than one-line message in
the error reporting interrupt handler. For errors triggered by
access PCI config space or MMIO, we replace "WARN(1, ...)" with
pr_err() and dump_stack().

Signed-off-by: Gavin Shan <shangw at linux.vnet.ibm.com>
---
 arch/powerpc/kernel/eeh.c                 |    9 +++++++--
 arch/powerpc/platforms/powernv/eeh-ioda.c |   25 ++++++++++++++++---------
 2 files changed, 23 insertions(+), 11 deletions(-)

diff --git a/arch/powerpc/kernel/eeh.c b/arch/powerpc/kernel/eeh.c
index 60deb42..38e4b40 100644
--- a/arch/powerpc/kernel/eeh.c
+++ b/arch/powerpc/kernel/eeh.c
@@ -324,7 +324,9 @@ static int eeh_phb_check_failure(struct eeh_pe *pe)
 	eeh_serialize_unlock(flags);
 	eeh_send_failure_event(phb_pe);
 
-	WARN(1, "EEH: PHB failure detected\n");
+	pr_err("EEH: PHB#%x failure detected\n",
+		phb_pe->phb->global_number);
+	dump_stack();
 
 	return 1;
 out:
@@ -453,7 +455,10 @@ int eeh_dev_check_failure(struct eeh_dev *edev)
 	 * a stack trace will help the device-driver authors figure
 	 * out what happened.  So print that out.
 	 */
-	WARN(1, "EEH: failure detected\n");
+	pr_err("EEH: Frozen PE#%x detected on PHB#%x\n",
+		pe->addr, pe->phb->global_number);
+	dump_stack();
+
 	return 1;
 
 dn_unlock:
diff --git a/arch/powerpc/platforms/powernv/eeh-ioda.c b/arch/powerpc/platforms/powernv/eeh-ioda.c
index 85025d7..0cd1c4a 100644
--- a/arch/powerpc/platforms/powernv/eeh-ioda.c
+++ b/arch/powerpc/platforms/powernv/eeh-ioda.c
@@ -853,11 +853,14 @@ static int ioda_eeh_next_error(struct eeh_pe **pe)
 					phb->eeh_state |= PNV_EEH_STATE_REMOVED;
 				}
 
-				WARN(1, "EEH: dead IOC detected\n");
+				pr_err("EEH: dead IOC detected\n");
 				ret = 4;
 				goto out;
-			} else if (severity == OPAL_EEH_SEV_INF)
+			} else if (severity == OPAL_EEH_SEV_INF) {
+				pr_info("EEH: IOC informative error "
+					"detected\n");
 				ioda_eeh_hub_diag(hose);
+			}
 
 			break;
 		case OPAL_EEH_PHB_ERROR:
@@ -865,8 +868,8 @@ static int ioda_eeh_next_error(struct eeh_pe **pe)
 				if (ioda_eeh_get_phb_pe(hose, pe))
 					break;
 
-				WARN(1, "EEH: dead PHB#%x detected\n",
-				     hose->global_number);
+				pr_err("EEH: dead PHB#%x detected\n",
+					hose->global_number);
 				phb->eeh_state |= PNV_EEH_STATE_REMOVED;
 				ret = 3;
 				goto out;
@@ -874,20 +877,24 @@ static int ioda_eeh_next_error(struct eeh_pe **pe)
 				if (ioda_eeh_get_phb_pe(hose, pe))
 					break;
 
-				WARN(1, "EEH: fenced PHB#%x detected\n",
-				     hose->global_number);
+				pr_err("EEH: fenced PHB#%x detected\n",
+					hose->global_number);
 				ret = 2;
 				goto out;
-			} else if (severity == OPAL_EEH_SEV_INF)
+			} else if (severity == OPAL_EEH_SEV_INF) {
+				pr_info("EEH: PHB#%x informative error "
+					"detected\n",
+					hose->global_number);
 				ioda_eeh_phb_diag(hose);
+			}
 
 			break;
 		case OPAL_EEH_PE_ERROR:
 			if (ioda_eeh_get_pe(hose, frozen_pe_no, pe))
 				break;
 
-			WARN(1, "EEH: Frozen PE#%x on PHB#%x detected\n",
-			     (*pe)->addr, (*pe)->phb->global_number);
+			pr_err("EEH: Frozen PE#%x on PHB#%x detected\n",
+				(*pe)->addr, (*pe)->phb->global_number);
 			ret = 1;
 			goto out;
 		}
-- 
1.7.5.4