Re: character driver - poll() timeout

From: Richard Weinberger
Date: Tue Oct 27 2015 - 11:20:19 EST

On Tue, Oct 27, 2015 at 3:56 PM, Muni Sekhar <munisekharrms@xxxxxxxxx> wrote:
> On Tue, Oct 27, 2015 at 1:41 PM, Clemens Ladisch <clemens@xxxxxxxxxx> wrote:
>> Muni Sekhar wrote:
>>> Is it possible to print the timeout value in character driver poll() API?
>> No. Your driver's poll callback never waits.
>> Why do you think you need this value?
> I need to find out when exactly driver's poll callback returned timeout.

Kernel's poll() is just the generic backend for any kind of polling
API. Like select(), epoll or poll().
If your driver needs to know the timeout, it is broken by design.

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