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[NTOSKRNL]

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- Remove an unused member from PNPROOT_DEVICE
- Don't build a bogus resource list if no resources are required
- Fixes a crash during resource arbitration because the created resource requirements list was malformed

svn path=/trunk/; revision=46710
This commit is contained in:
Cameron Gutman 2010-04-04 02:59:31 +00:00
parent e0b95b05b0
commit 93c0c968c0
1 changed files with 18 additions and 32 deletions
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50
reactos/ntoskrnl/io/pnpmgr/pnproot.c
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@ -33,7 +33,6 @@ typedef struct _PNPROOT_DEVICE
UNICODE_STRING DeviceDescription;
// Resource requirement list
PIO_RESOURCE_REQUIREMENTS_LIST ResourceRequirementsList;
ULONG ResourceRequirementsListSize;
// Associated resource list
PCM_RESOURCE_LIST ResourceList;
ULONG ResourceListSize;
@ -766,18 +765,7 @@ PdoQueryResources(
DeviceExtension = (PPNPROOT_PDO_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
if (DeviceExtension->DeviceInfo->ResourceList == NULL)
{
/* Create an empty resource list */
ResourceList = ExAllocatePool(PagedPool, sizeof(CM_RESOURCE_LIST));
if (!ResourceList)
return STATUS_NO_MEMORY;
ResourceList->Count = 0;
Irp->IoStatus.Information = (ULONG_PTR)ResourceList;
}
else
if (DeviceExtension->DeviceInfo->ResourceList)
{
/* Copy existing resource requirement list */
ResourceList = ExAllocatePool(
@ -792,9 +780,14 @@ PdoQueryResources(
DeviceExtension->DeviceInfo->ResourceListSize);
Irp->IoStatus.Information = (ULONG_PTR)ResourceList;
}
return STATUS_SUCCESS;
return STATUS_SUCCESS;
}
else
{
/* No resources so just return without changing the status */
return Irp->IoStatus.Status;
}
}
static NTSTATUS
@ -805,23 +798,10 @@ PdoQueryResourceRequirements(
{
PPNPROOT_PDO_DEVICE_EXTENSION DeviceExtension;
PIO_RESOURCE_REQUIREMENTS_LIST ResourceList;
ULONG ResourceListSize = FIELD_OFFSET(IO_RESOURCE_REQUIREMENTS_LIST, List);
DeviceExtension = (PPNPROOT_PDO_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
if (DeviceExtension->DeviceInfo->ResourceRequirementsList == NULL)
{
/* Create an empty resource list */
ResourceList = ExAllocatePool(PagedPool, ResourceListSize);
if (!ResourceList)
return STATUS_NO_MEMORY;
RtlZeroMemory(ResourceList, ResourceListSize);
ResourceList->ListSize = ResourceListSize;
Irp->IoStatus.Information = (ULONG_PTR)ResourceList;
}
else
if (DeviceExtension->DeviceInfo->ResourceRequirementsList)
{
/* Copy existing resource requirement list */
ResourceList = ExAllocatePool(PagedPool, DeviceExtension->DeviceInfo->ResourceRequirementsList->ListSize);
@ -832,10 +812,16 @@ PdoQueryResourceRequirements(
ResourceList,
DeviceExtension->DeviceInfo->ResourceRequirementsList,
DeviceExtension->DeviceInfo->ResourceRequirementsList->ListSize);
Irp->IoStatus.Information = (ULONG_PTR)ResourceList;
}
return STATUS_SUCCESS;
Irp->IoStatus.Information = (ULONG_PTR)ResourceList;
return STATUS_SUCCESS;
}
else
{
/* No resource requirements so just return without changing the status */
return Irp->IoStatus.Status;
}
}
static NTSTATUS