workqueues - how to use them correctly

hi all, My question is regarding the correct use of workqueues. I have a driver which queues a work item in the interrupt handler. The bottom half function ( the workitem -function ) does have proper locking ( mutex ) in place for atomicity. With this setup, since the interrupts are enabled, it's possible to have a scenario where, when one workitem is being executed, another can be queued up, which results in the workitems being executed in parallel, however since there is a mutex, one thread will sleep. is this particular scenario considered bad or discouraged ? Thank you, -Roshan