[reactos] 03/03: [SETUPAPI] Correctly enumerate non-installed devices in SetupDiGetClassDevsExW

[Hervé Poussineau]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=e044df87366d52fa5dfce…

commit e044df87366d52fa5dfce50e994e3d8e2a2965c7
Author:     Hervé Poussineau <hpoussin(a)reactos.org>
AuthorDate: Sun Apr 11 15:10:47 2021 +0200
Commit:     Hervé Poussineau <hpoussin(a)reactos.org>
CommitDate: Sun Apr 11 15:12:02 2021 +0200

    [SETUPAPI] Correctly enumerate non-installed devices in SetupDiGetClassDevsExW
    
    Always try to read the correct device GUID from registry, even if GUID filter is
disabled.
    
    CORE-17527
---
 dll/win32/setupapi/devclass.c | 51 ++++++++++++++++++++-----------------------
 1 file changed, 24 insertions(+), 27 deletions(-)

diff --git a/dll/win32/setupapi/devclass.c b/dll/win32/setupapi/devclass.c
index 56398262437..61aa7eb8329 100644
--- a/dll/win32/setupapi/devclass.c
+++ b/dll/win32/setupapi/devclass.c
@@ -179,38 +179,35 @@ SETUP_CreateDevicesList(
         }
 
         /* Retrieve GUID of this device */
-        if (Class)
+        ClassGuidBufferSize = sizeof(ClassGuidBuffer);
+        cr = CM_Get_DevNode_Registry_Property_ExW(dnDevInst,
+                                                  CM_DRP_CLASSGUID,
+                                                  NULL,
+                                                  ClassGuidBuffer,
+                                                  &ClassGuidBufferSize,
+                                                  0,
+                                                  list->hMachine);
+        if (cr == CR_SUCCESS)
         {
-            ClassGuidBufferSize = sizeof(ClassGuidBuffer);
-            cr = CM_Get_DevNode_Registry_Property_ExW(dnDevInst,
-                                                      CM_DRP_CLASSGUID,
-                                                      NULL,
-                                                      ClassGuidBuffer,
-                                                      &ClassGuidBufferSize,
-                                                      0,
-                                                      list->hMachine);
-            if (cr == CR_SUCCESS)
+            ClassGuidBuffer[MAX_GUID_STRING_LEN - 2] = '\0'; /* Replace the } by
a NULL character */
+            if (UuidFromStringW(&ClassGuidBuffer[1], &ClassGuid) != RPC_S_OK)
             {
-                ClassGuidBuffer[MAX_GUID_STRING_LEN - 2] = '\0'; /* Replace the }
by a NULL character */
-                if (UuidFromStringW(&ClassGuidBuffer[1], &ClassGuid) !=
RPC_S_OK)
-                {
-                    /* Bad GUID, skip the entry */
-                    ERR("Invalid ClassGUID '%S' for device %S\n",
ClassGuidBuffer, InstancePath);
-                    continue;
-                }
-            }
-            else
-            {
-                TRACE("Using default class GUID_NULL for device %S\n",
InstancePath);
-                memcpy(&ClassGuid, &GUID_NULL, sizeof(GUID));
-            }
-
-            if (!IsEqualIID(&ClassGuid, Class))
-            {
-                TRACE("Skipping %S due to wrong class GUID\n", InstancePath);
+                /* Bad GUID, skip the entry */
+                ERR("Invalid ClassGUID '%S' for device %S\n",
ClassGuidBuffer, InstancePath);
                 continue;
             }
         }
+        else
+        {
+            TRACE("Using default class GUID_NULL for device %S\n",
InstancePath);
+            memcpy(&ClassGuid, &GUID_NULL, sizeof(GUID));
+        }
+
+        if (Class && !IsEqualIID(&ClassGuid, Class))
+        {
+            TRACE("Skipping %S due to wrong class GUID\n", InstancePath);
+            continue;
+        }
 
         /* Good! Create a device info element */
         if (!CreateDeviceInfo(list, InstancePath, &ClassGuid, &deviceInfo))