Re: Serial driver hangs

[Paul Fulghum]

On Tue, 2004-09-28 at 16:16, Russell King wrote:
> On Tue, Sep 28, 2004 at 04:10:31PM -0500, Paul Fulghum wrote:
> Some 16x50 ports (most of the ones higher than 16550A) have auto flow
> control, so if this is enabled you really don't want to drop bytes in
> the FIFO on the floor.

The alternative is to implement a flow control
mechanism between the flip buffer layer and
the tty drivers to (at the very least)
enable/disable receive interrupts.

Since the flip buffer implementation is probably
going to need rework anyways (eventually) along
with the other tty locking issues, this may not
be a trivial task.

Dropping the bytes is a simple, local fix that
will be more sane than the current
behavior of locking the machine.

A more optimized solution is likely to take a while.

-- 
Paul Fulghum
paulkf@xxxxxxxxxxxxx


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