[Qemu-devel] [PATCH] mmap-alloc: fix error handling

[Michael S. Tsirkin]

Existing callers are checking for MAP_FAILED,
so we should return that on error.

Reported-by: Paolo Bonzini <pbonz...@redhat.com>
Signed-off-by: Michael S. Tsirkin <m...@redhat.com>
---
 util/mmap-alloc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/util/mmap-alloc.c b/util/mmap-alloc.c
index 1394269..c37acbe 100644
--- a/util/mmap-alloc.c
+++ b/util/mmap-alloc.c
@@ -26,7 +26,7 @@ void *qemu_ram_mmap(int fd, size_t size, size_t align, bool 
shared)
     void *ptr1;
 
     if (ptr == MAP_FAILED) {
-        return NULL;
+        return MAP_FAILED;
     }
 
     /* Make sure align is a power of 2 */
@@ -41,7 +41,7 @@ void *qemu_ram_mmap(int fd, size_t size, size_t align, bool 
shared)
                 fd, 0);
     if (ptr1 == MAP_FAILED) {
         munmap(ptr, total);
-        return NULL;
+        return MAP_FAILED;
     }
 
     ptr += offset;
-- 
MST