[ros-diffs] [reactos] 02/07: [ISAPNP] Return a compatibleIDs only if defined

[Hervé Poussineau]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=42724f47f841846a00eb5…

commit 42724f47f841846a00eb50a55345b4804e49a70a
Author:     Hervé Poussineau <hpoussin(a)reactos.org>
AuthorDate: Sat Mar 21 14:58:36 2020 +0100
Commit:     Hervé Poussineau <hpoussin(a)reactos.org>
CommitDate: Sun Mar 22 14:29:38 2020 +0100

    [ISAPNP] Return a compatibleIDs only if defined
---
 drivers/bus/isapnp/isapnp.c | 7 +++++++
 drivers/bus/isapnp/isapnp.h | 1 +
 drivers/bus/isapnp/pdo.c    | 6 ++++--
 3 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/bus/isapnp/isapnp.c b/drivers/bus/isapnp/isapnp.c
index 35f5041d904..16fd14c489d 100644
--- a/drivers/bus/isapnp/isapnp.c
+++ b/drivers/bus/isapnp/isapnp.c
@@ -335,6 +335,7 @@ IsaPnpCreateReadPortDO(PISAPNP_FDO_EXTENSION FdoExt)
 {
     UNICODE_STRING DeviceID = RTL_CONSTANT_STRING(L"ISAPNP\\ReadDataPort\0");
     UNICODE_STRING HardwareIDs =
RTL_CONSTANT_STRING(L"ISAPNP\\ReadDataPort\0\0");
+    UNICODE_STRING CompatibleIDs = RTL_CONSTANT_STRING(L"\0\0");
     UNICODE_STRING InstanceID = RTL_CONSTANT_STRING(L"0\0");
     PISAPNP_PDO_EXTENSION PdoExt;
 
@@ -367,6 +368,12 @@ IsaPnpCreateReadPortDO(PISAPNP_FDO_EXTENSION FdoExt)
     if (!NT_SUCCESS(Status))
         return Status;
 
+    Status = IsaPnpDuplicateUnicodeString(0,
+                                          &CompatibleIDs,
+                                          &PdoExt->CompatibleIDs);
+    if (!NT_SUCCESS(Status))
+        return Status;
+
     Status = IsaPnpDuplicateUnicodeString(0,
                                           &InstanceID,
                                           &PdoExt->InstanceID);
diff --git a/drivers/bus/isapnp/isapnp.h b/drivers/bus/isapnp/isapnp.h
index 4a68b5ee11d..8417687867b 100644
--- a/drivers/bus/isapnp/isapnp.h
+++ b/drivers/bus/isapnp/isapnp.h
@@ -51,6 +51,7 @@ typedef struct _ISAPNP_PDO_EXTENSION {
     PISAPNP_FDO_EXTENSION FdoExt;
     UNICODE_STRING DeviceID;
     UNICODE_STRING HardwareIDs;
+    UNICODE_STRING CompatibleIDs;
     UNICODE_STRING InstanceID;
 } ISAPNP_PDO_EXTENSION, *PISAPNP_PDO_EXTENSION;
 
diff --git a/drivers/bus/isapnp/pdo.c b/drivers/bus/isapnp/pdo.c
index 5d601c985ee..68e1714cd6f 100644
--- a/drivers/bus/isapnp/pdo.c
+++ b/drivers/bus/isapnp/pdo.c
@@ -93,7 +93,6 @@ IsaPdoQueryId(
     IN PIRP Irp,
     IN PIO_STACK_LOCATION IrpSp)
 {
-    UNICODE_STRING EmptyString = RTL_CONSTANT_STRING(L"");
     PUNICODE_STRING Source;
     PWCHAR Buffer;
 
@@ -111,7 +110,7 @@ IsaPdoQueryId(
 
         case BusQueryCompatibleIDs:
             DPRINT("IRP_MJ_PNP / IRP_MN_QUERY_ID / BusQueryCompatibleIDs\n");
-            Source = &EmptyString;
+            Source = &PdoExt->CompatibleIDs;
             break;
 
         case BusQueryInstanceID:
@@ -125,6 +124,9 @@ IsaPdoQueryId(
           return Irp->IoStatus.Status;
     }
 
+    if (!Source->Buffer)
+        return Irp->IoStatus.Status;
+
     Buffer = ExAllocatePool(PagedPool, Source->MaximumLength);
     if (!Buffer)
         return STATUS_NO_MEMORY;