[Bug 201492] [PATCH] uart_core: start countdown for non-interrupt mode

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=201492

            Bug ID: 201492
           Summary: [PATCH] uart_core: start countdown for non-interrupt
                    mode
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Keywords: patch
          Severity: Affects Many People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: rndfax at yandex.ru
          Keywords: patch

The uart_intr will never be called if interrupts are not available.
Start counter with callout_reset call.

I submitted the patch here:
https://reviews.freebsd.org/D3042
and here:
https://lists.freebsd.org/pipermail/freebsd-current/2015-July/056500.html

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