From cb1033581e2ef92defd57b91bfe290dee11ad588 Mon Sep 17 00:00:00 2001
From: OBattler <oubattler@gmail.com>
Date: Tue, 28 Oct 2025 01:58:24 +0100
Subject: [PATCH] mem.c: Make sure the topmost for loop on mappings recalculate
 exits right after the first iteration if the mapping's end is zero (ie. if no
 address bits are ignored).

---
 src/mem/mem.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/mem/mem.c b/src/mem/mem.c
index b4225372d..24500ef23 100644
--- a/src/mem/mem.c
+++ b/src/mem/mem.c
@@ -2347,6 +2347,9 @@ mem_mapping_recalc(uint64_t base, uint64_t size)
                                                    _mem_state[c >> MEM_GRANULARITY_BITS].states[n].r))
                         read_mapping_bus[c >> MEM_GRANULARITY_BITS] = map;
                 }
+
+                if (i_e == 0x00000000ULL)
+                    break;
             }
         }
         map = map->next;