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[USB-BRINGUP]

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- Create a pesudo random instance id
- Fixes assert when plugin usb devices whose device descriptor don't provide a serial number

svn path=/branches/usb-bringup/; revision=54836
This commit is contained in:
Johannes Anderwald 2012-01-05 00:13:50 +00:00
parent 874bc6a408
commit 4dc6e068e2
1 changed files with 22 additions and 0 deletions
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22
drivers/usb/usbhub_new/fdo.c
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@ -954,6 +954,28 @@ CreateDeviceIds(
UsbChildExtension->usInstanceId.MaximumLength = UsbChildExtension->usInstanceId.Length;
DPRINT1("Usb InstanceId %wZ\n", &UsbChildExtension->usInstanceId);
}
else
{
//
// the device did not provide a serial number, lets create a pseudo instance id
//
Index = swprintf(BufferPtr, L"USB\\Vid_%04x&Pid_%04x&1A0700BC\0", UsbChildExtension->DeviceDesc.idVendor, UsbChildExtension->DeviceDesc.idProduct) + 1;
UsbChildExtension->usInstanceId.Buffer = (LPWSTR)ExAllocatePool(NonPagedPool, Index * sizeof(WCHAR));
if (UsbChildExtension->usInstanceId.Buffer == NULL)
{
DPRINT1("Error: failed to allocate %lu bytes\n", Index * sizeof(WCHAR));
goto Cleanup;
}
//
// copy instance id
//
RtlCopyMemory(UsbChildExtension->usInstanceId.Buffer, BufferPtr, wcslen(BufferPtr) * sizeof(WCHAR));
UsbChildExtension->usInstanceId.Length = UsbChildExtension->usDeviceId.MaximumLength = Index * sizeof(WCHAR);
DPRINT1("usDeviceId %wZ\n", &UsbChildExtension->usInstanceId);
}
return Status;