[wdmaudiodev] Re: (no subject)
- From: "Sam Tertzakian" <sam@xxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Thu, 13 Oct 2005 22:54:28 -0700
I think error occurs when the File Handle is no longer valid. Like if the
underlying device is suddenly removed.
-----Original Message-----
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Squall
Sent: Tuesday, October 11, 2005 9:23 AM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: (no subject)
Hi,
I am now writing a Ring 3 application that will register KSEvent on my
Ring 0 miniport driver such that it receives notification from driver when
there's any status change in the hardware. However i am seeing strange thing
on my Ring 0 driver. Basically it receives my Event Enable call but not my
Event Disable call.
My Ring 3 Enable call is as follows:
bSuccess = DeviceIoControl(m_hDevHandle,
IOCTL_KS_ENABLE_EVENT,
&KsEvent,
sizeof(KSEVENT),
&KsEventData,
sizeof(KSEVENTDATA),
&dwReturn,
NULL);
and my disable call goes like this:
bSuccess = DeviceIoControl(m_hDevHandle,
IOCTL_KS_DISABLE_EVENT,
&KsEventData,
sizeof(KSEVENTDATA),
NULL,
0,
&dwReturn,
NULL);
where the KsEventData is the same as the one used in Event Enable.
For Disable event bSuccess returns me a FALSE with GetLastError() = 0x1F
(ERROR_GEN_FAILURE).
Can anyone shed a light on what's the problem here?
Thanks in advance!
Squall.
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