[PATCH 5/6] win32u: Lock display devices mutex in find_adapter.

[Rémi Bernon]

From: Rémi Bernon

---
 dlls/win32u/sysparams.c | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/dlls/win32u/sysparams.c b/dlls/win32u/sysparams.c
index 84f58254bbf..12778d77819 100644
--- a/dlls/win32u/sysparams.c
+++ b/dlls/win32u/sysparams.c
@@ -2020,12 +2020,15 @@ static struct adapter *find_adapter( UNICODE_STRING *name )
     struct display_device *device;
     struct adapter *adapter;

+    if (!lock_display_devices()) return NULL;
+
     if (name && name->Length) device = find_adapter_device_by_name( name );
-    else device = find_adapter_device_by_id( 0 ); /* use primary adapter */
+    else device = find_adapter_device_by_id( 0 );

if (!device) adapter = NULL;
     else adapter = adapter_acquire( CONTAINING_RECORD( device, struct adapter, dev ) );

+    unlock_display_devices();
     return adapter;
 }

@@ -2493,10 +2496,7 @@ LONG WINAPI NtUserChangeDisplaySettings( UNICODE_STRING *devname, DEVMODEW *devm

if ((!devname || !devname->Length) && !devmode) return apply_display_settings( NULL, NULL, hwnd, flags, lparam );

-    if (!lock_display_devices()) return DISP_CHANGE_FAILED;
-    adapter = find_adapter( devname );
-    unlock_display_devices();
-    if (!adapter) return DISP_CHANGE_BADPARAM;
+    if (!(adapter = find_adapter( devname ))) return DISP_CHANGE_BADPARAM;

if (!adapter_get_full_mode( adapter, devmode, &full_mode )) ret = DISP_CHANGE_BADMODE;
     else if ((flags & CDS_UPDATEREGISTRY) && !adapter_set_registry_settings( adapter, &full_mode )) ret = DISP_CHANGE_NOTUPDATED;
@@ -2552,10 +2552,7 @@ BOOL WINAPI NtUserEnumDisplaySettings( UNICODE_STRING *device, DWORD index, DEVM

TRACE( "device %s, index %#x, devmode %p, flags %#x\n", debugstr_us(device), index, devmode, flags );

-    if (!lock_display_devices()) return FALSE;
-    adapter = find_adapter( device );
-    unlock_display_devices();
-    if (!adapter) return FALSE;
+    if (!(adapter = find_adapter( device ))) return FALSE;

lstrcpynW( devmode->dmDeviceName, wine_display_driverW, ARRAY_SIZE(devmode->dmDeviceName) );
     devmode->dmSpecVersion = DM_SPECVERSION;