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and MiniportHandleInterrupt() is fired off later via a task queue in ndis_intrtask(). This more accurately follows the NDIS interrupt handling model, where the ISR does a minimal amount of work in interrupt context and the handler is defered and run at a lower priority. Create a separate ndis_intrmtx mutex just for the guarding the ISR. Modify NdisSynchronizeWithInterrupt() to aquire the ndis_intrmtx mutex before invoking the synchronized procedure. (The purpose of this function is to provide mutual exclusion for code that shares variables with the ISR.) Modify NdisMRegisterInterrupt() to save a pointer to the miniport block in the ndis_miniport_interrupt structure so that NdisSynchronizeWithInterrupt() can grab it later and derive ndis_intrmtx from it.
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