qemu-devel
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Qemu-devel] [PATCH] Error check find_ram_offset


From: Alex Williamson
Subject: [Qemu-devel] [PATCH] Error check find_ram_offset
Date: Mon, 31 Oct 2011 08:54:09 -0600
User-agent: StGIT/0.14.3

Spotted via code review, we initialize offset to 0 to avoid a
compiler warning, but in the unlikely case that offset is
never set to something else, we should abort instead of return
a value that will almost certainly cause problems.

Signed-off-by: Alex Williamson <address@hidden>
---

 exec.c |   11 +++++++++--
 1 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/exec.c b/exec.c
index 9dc4edb..70f6fb8 100644
--- a/exec.c
+++ b/exec.c
@@ -2874,7 +2874,7 @@ static void *file_ram_alloc(RAMBlock *block,
 static ram_addr_t find_ram_offset(ram_addr_t size)
 {
     RAMBlock *block, *next_block;
-    ram_addr_t offset = 0, mingap = RAM_ADDR_MAX;
+    ram_addr_t offset = RAM_ADDR_MAX, mingap = RAM_ADDR_MAX;
 
     if (QLIST_EMPTY(&ram_list.blocks))
         return 0;
@@ -2890,10 +2890,17 @@ static ram_addr_t find_ram_offset(ram_addr_t size)
             }
         }
         if (next - end >= size && next - end < mingap) {
-            offset =  end;
+            offset = end;
             mingap = next - end;
         }
     }
+
+    if (offset == RAM_ADDR_MAX) {
+        fprintf(stderr, "Failed to find gap of requested size: %" PRIu64 "\n",
+                (uint64_t)size);
+        abort();
+    }
+
     return offset;
 }
 




reply via email to

[Prev in Thread] Current Thread [Next in Thread]