[Xen-changelog] [qemu-upstream-unstable] Revert "memory: Return -1 again on reads from unsigned regions"

[patchbot@xxxxxxx]

commit 2a93d3dd32386c3522cfa2ee60c9e06a298d1f52
Author:     Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
AuthorDate: Mon Sep 2 18:43:31 2013 +0200
Commit:     Michael Roth <mdroth@xxxxxxxxxxxxxxxxxx>
CommitDate: Tue Sep 24 22:31:53 2013 -0500

    Revert "memory: Return -1 again on reads from unsigned regions"
    
    This reverts commit 9b8c69243585a32d14b9bb9fcd52c37b0b5a1b71.
    
    The commit was wrong: We only return -1 on invalid accesses, not on
    valid but unbacked ones. This broke various corner cases.
    
    Cc: qemu-stable@xxxxxxxxxx
    Signed-off-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
    Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
    (cherry picked from commit 68a7439a150d6b4da99082ab454b9328b151bc25)
    
    Signed-off-by: Michael Roth <mdroth@xxxxxxxxxxxxxxxxxx>
---
 memory.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/memory.c b/memory.c
index 886f838..5a10fd0 100644
--- a/memory.c
+++ b/memory.c
@@ -872,7 +872,7 @@ static uint64_t unassigned_mem_read(void *opaque, hwaddr 
addr,
     if (current_cpu != NULL) {
         cpu_unassigned_access(current_cpu, addr, false, false, 0, size);
     }
-    return -1ULL;
+    return 0;
 }
 
 static void unassigned_mem_write(void *opaque, hwaddr addr,
--
generated by git-patchbot for /home/xen/git/qemu-upstream-unstable.git

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