bus: omap_l3_noc: Correct returning IRQ_HANDLED unconditionally in the irq handler

Correct returning IRQ_HANDLED unconditionally in the irq handler.
Return IRQ_NONE for some interrupt which we do not expect to be
handled in this handler. This prevents kernel stalling with back
to back spurious interrupts.

Fixes: 2722e56de6 ("OMAP4: l3: Introduce l3-interconnect error handling driver")
Acked-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/bus/omap_l3_noc.c b/drivers/bus/omap_l3_noc.c
index b5eac29d8f6e..17d86595951c 100644
--- a/drivers/bus/omap_l3_noc.c
+++ b/drivers/bus/omap_l3_noc.c
@@ -222,10 +222,14 @@ static irqreturn_t l3_interrupt_handler(int irq, void *_l3)
                         }
 
                         /* Error found so break the for loop */
-                        break;
+                        return IRQ_HANDLED;
                 }
         }
-        return IRQ_HANDLED;
+
+        dev_err(l3->dev, "L3 %s IRQ not handled!!\n",
+                inttype ? "debug" : "application");
+
+        return IRQ_NONE;
 }
 
 static const struct of_device_id l3_noc_match[] = {