timer_list for FreeBSD?

[Yong Ma]

Hi all!

     In my work I send some data to the card and wait for a result in a loop.but sometimes it can't get it ,so the driver run and run and can't get out of the loop.I need something like timer_list in Linux with which I can decide the max time the loop will run.I searched it in the source code but found little about that.Anyone can help?

Thanks
Yong

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