pseries: Fix buggy spapr_vio_find_by_reg()

The spapr_vio_find_by_reg() function in hw/spapr_vio.c is supposed to find
the device structure for a PAPR virtual IO device with the given reg value,
and return NULL if none exists.

It does the first ok, but if no device with that reg exists, it just
returns the last device traversed in the list.  This patch fixes it.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>

diff --git a/hw/spapr_vio.c b/hw/spapr_vio.c
index 25cfc9d..b7b3ddd 100644 (file)
--- a/hw/spapr_vio.c
+++ b/hw/spapr_vio.c
@@ -66,11 +66,11 @@ VIOsPAPRDevice *spapr_vio_find_by_reg(VIOsPAPRBus *bus, uint32_t reg)
     QTAILQ_FOREACH(qdev, &bus->bus.children, sibling) {
         dev = (VIOsPAPRDevice *)qdev;
         if (dev->reg == reg) {
-            break;
+            return dev;
         }
     }
 
-    return dev;
+    return NULL;
 }
 
 #ifdef CONFIG_FDT