diff options
Diffstat (limited to 'backends/hostmem.c')
| -rw-r--r-- | backends/hostmem.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/backends/hostmem.c b/backends/hostmem.c index 89feb9ed75..4606b73849 100644 --- a/backends/hostmem.c +++ b/backends/hostmem.c @@ -45,7 +45,7 @@ host_memory_backend_set_size(Object *obj, Visitor *v, const char *name, Error *local_err = NULL; uint64_t value; - if (memory_region_size(&backend->mr)) { + if (host_memory_backend_mr_inited(backend)) { error_setg(&local_err, "cannot change property value"); goto out; } @@ -146,7 +146,7 @@ static void host_memory_backend_set_merge(Object *obj, bool value, Error **errp) { HostMemoryBackend *backend = MEMORY_BACKEND(obj); - if (!memory_region_size(&backend->mr)) { + if (!host_memory_backend_mr_inited(backend)) { backend->merge = value; return; } @@ -172,7 +172,7 @@ static void host_memory_backend_set_dump(Object *obj, bool value, Error **errp) { HostMemoryBackend *backend = MEMORY_BACKEND(obj); - if (!memory_region_size(&backend->mr)) { + if (!host_memory_backend_mr_inited(backend)) { backend->dump = value; return; } @@ -208,7 +208,7 @@ static void host_memory_backend_set_prealloc(Object *obj, bool value, } } - if (!memory_region_size(&backend->mr)) { + if (!host_memory_backend_mr_inited(backend)) { backend->prealloc = value; return; } @@ -237,10 +237,19 @@ static void host_memory_backend_init(Object *obj) backend->prealloc = mem_prealloc; } +bool host_memory_backend_mr_inited(HostMemoryBackend *backend) +{ + /* + * NOTE: We forbid zero-length memory backend, so here zero means + * "we haven't inited the backend memory region yet". + */ + return memory_region_size(&backend->mr) != 0; +} + MemoryRegion * host_memory_backend_get_memory(HostMemoryBackend *backend, Error **errp) { - return memory_region_size(&backend->mr) ? &backend->mr : NULL; + return host_memory_backend_mr_inited(backend) ? &backend->mr : NULL; } void host_memory_backend_set_mapped(HostMemoryBackend *backend, bool mapped) |