1 files changed, 15 insertions, 2 deletions

diff --git a/arch/powerpc/platforms/iseries/lpevents.c b/arch/powerpc/platforms/iseries/lpevents.c
index 34bdbbe3ce59..275f49449839 100644
--- a/arch/powerpc/platforms/iseries/lpevents.c
+++ b/arch/powerpc/platforms/iseries/lpevents.c
@@ -121,6 +121,7 @@ void process_hvlpevents(void)
 {
         struct HvLpEvent * event;
 
+ restart:
         /* If we have recursed, just return */
         if (!spin_trylock(&hvlpevent_queue.hq_lock))
                 return;
@@ -146,8 +147,20 @@ void process_hvlpevents(void)
                         if (event->xType < HvLpEvent_Type_NumTypes &&
                                         lpEventHandler[event->xType])
                                 lpEventHandler[event->xType](event);
-                        else
-                                printk(KERN_INFO "Unexpected Lp Event type=%d\n", event->xType );
+                        else {
+                                u8 type = event->xType;
+
+                                /*
+                                 * Don't printk in the spinlock as printk
+                                 * may require ack events form the HV to send
+                                 * any characters there.
+                                 */
+                                hvlpevent_clear_valid(event);
+                                spin_unlock(&hvlpevent_queue.hq_lock);
+                                printk(KERN_INFO
+                                        "Unexpected Lp Event type=%d\n", type);
+                                goto restart;
+                        }
 
                         hvlpevent_clear_valid(event);
                 } else if (hvlpevent_queue.hq_overflow_pending)