[reactos] 02/06: [SACDRV] Fix uninitialized variable usage.

[Thomas Faber]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=4be3bc682dbffb845318b…

commit 4be3bc682dbffb845318b868eb3f9de1d8ece1c5
Author:     Thomas Faber <thomas.faber(a)reactos.org>
AuthorDate: Sat Oct 9 15:59:58 2021 -0400
Commit:     Thomas Faber <thomas.faber(a)reactos.org>
CommitDate: Wed Oct 27 19:27:32 2021 -0400

    [SACDRV] Fix uninitialized variable usage.
    
    Powered by clang-cl.
---
 drivers/sac/driver/data.c   | 41 ++++++++++++++++++++++-------------------
 drivers/sac/driver/sacdrv.h |  1 +
 2 files changed, 23 insertions(+), 19 deletions(-)

diff --git a/drivers/sac/driver/data.c b/drivers/sac/driver/data.c
index d7f1ae09d09..face230f688 100644
--- a/drivers/sac/driver/data.c
+++ b/drivers/sac/driver/data.c
@@ -153,27 +153,29 @@ FreeDeviceData(IN PDEVICE_OBJECT DeviceObject)
 
     /* Get the device extension and see how far we had gotten */
     DeviceExtension = (PSAC_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
-    if ((GlobalDataInitialized) && (DeviceExtension->Initialized))
+    if (!(GlobalDataInitialized) || !(DeviceExtension->Initialized))
     {
-        /* Attempt to rundown while holding the lock */
+        goto Exit;
+    }
+
+    /* Attempt to rundown while holding the lock */
+    KeAcquireSpinLock(&DeviceExtension->Lock, &OldIrql);
+    while (DeviceExtension->RundownInProgress)
+    {
+        SAC_DBG(SAC_DBG_ENTRY_EXIT, "SAC FreeDeviceData: Waiting....\n");
+
+        /* Initiate and wait for rundown */
+        KeInitializeEvent(&DeviceExtension->RundownEvent, SynchronizationEvent,
0);
+        KeReleaseSpinLock(&DeviceExtension->Lock, OldIrql);
+        Status = KeWaitForSingleObject(&DeviceExtension->RundownEvent,
+                                       Executive,
+                                       KernelMode,
+                                       FALSE,
+                                       NULL);
+        ASSERT(Status == STATUS_SUCCESS);
+
+        /* Re-acquire the lock and check if rundown is done */
         KeAcquireSpinLock(&DeviceExtension->Lock, &OldIrql);
-        while (DeviceExtension->RundownInProgress)
-        {
-            SAC_DBG(SAC_DBG_ENTRY_EXIT, "SAC FreeDeviceData: Waiting....\n");
-
-            /* Initiate and wait for rundown */
-            KeInitializeEvent(&DeviceExtension->RundownEvent,
SynchronizationEvent, 0);
-            KeReleaseSpinLock(&DeviceExtension->Lock, OldIrql);
-            Status = KeWaitForSingleObject(&DeviceExtension->RundownEvent,
-                                           Executive,
-                                           KernelMode,
-                                           FALSE,
-                                           NULL);
-            ASSERT(Status == STATUS_SUCCESS);
-
-            /* Re-acquire the lock and check if rundown is done */
-            KeAcquireSpinLock(&DeviceExtension->Lock, &OldIrql);
-        }
     }
 
     /* Now set the rundown flag while we cancel the timer */
@@ -205,6 +207,7 @@ FreeDeviceData(IN PDEVICE_OBJECT DeviceObject)
     KeAcquireSpinLock(&DeviceExtension->Lock, &OldIrql);
     DeviceExtension->Initialized = FALSE;
     KeReleaseSpinLock(&DeviceExtension->Lock, OldIrql);
+Exit:
     SAC_DBG(SAC_DBG_ENTRY_EXIT, "SAC FreeDeviceData: Exiting.\n");
 }
 
diff --git a/drivers/sac/driver/sacdrv.h b/drivers/sac/driver/sacdrv.h
index 0280b6c9d1c..9c44671985f 100644
--- a/drivers/sac/driver/sacdrv.h
+++ b/drivers/sac/driver/sacdrv.h
@@ -74,6 +74,7 @@
     {                                                                   \
         if (!VerifyEventWaitable(Attributes->x, &Object, &WaitObject))  \
         {                                                               \
+            Status = STATUS_INVALID_HANDLE;                             \
             goto FailChannel;                                           \
         }                                                               \
         Channel->x = Attributes->x;                                     \