SyncReqSend rule (kmdf)

The SyncReqSend rule specifies that all synchronous send requests are done by using synchronous-specific KMDF device driver interface methods, and that the methods have a nonzero timeout value set.

If the driver calls a WDFxxxSendXXXSynchronously method without setting a valid timeout, the thread can become stalled if hardware does not respond promptly.

Driver model KMDF

How to test

At compile time

Run Static Driver Verifier and specify the SyncReqSend rule.

Use the following steps to run an analysis of your code:
  1. Prepare your code (use role type declarations).
  2. Run Static Driver Verifier.
  3. View and analyze the results.

For more information, see Using Static Driver Verifier to Find Defects in Drivers.

Applies to

WdfIoTargetSendIoctlSynchronously WdfIoTargetSendReadSynchronously WdfIoTargetSendWriteSynchronously WdfUsbTargetDeviceSendControlTransferSynchronously WdfUsbTargetDeviceSendUrbSynchronously WdfUsbTargetPipeReadSynchronously WdfUsbTargetPipeSendUrbSynchronously WdfUsbTargetPipeWriteSynchronously