From: Paul Fulghum <paulkf@microgate.com>
To: Russell King <rmk+lkml@arm.linux.org.uk>
Cc: "Roland Caßebohm" <roland.cassebohm@VisionSystems.de>,
"Linux Kernel list" <linux-kernel@vger.kernel.org>
Subject: Re: Serial driver hangs
Date: Tue, 28 Sep 2004 18:03:03 -0500 [thread overview]
Message-ID: <1096412582.6003.8.camel@at2.pipehead.org> (raw)
In-Reply-To: <20040928221600.D14747@flint.arm.linux.org.uk>
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@microgate.com
next prev parent reply other threads:[~2004-09-28 23:03 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-28 15:34 Serial driver hangs Roland Caßebohm
2004-09-28 21:10 ` Paul Fulghum
2004-09-28 21:16 ` Russell King
2004-09-28 23:03 ` Paul Fulghum [this message]
2004-09-28 22:12 ` Alan Cox
2004-09-29 1:12 ` Paul Fulghum
2004-09-29 13:09 ` Roland Caßebohm
2004-09-29 13:17 ` Paul Fulghum
2004-09-29 14:07 ` Roland Caßebohm
2004-09-29 14:25 ` Paul Fulghum
2004-09-30 16:16 ` Roland Caßebohm
2004-09-30 19:09 ` Paul Fulghum
2004-09-30 18:34 ` Alan Cox
2004-09-30 19:51 ` Paul Fulghum
2004-09-30 19:59 ` Russell King
2004-09-30 20:05 ` Paul Fulghum
2004-09-30 20:30 ` Paul Fulghum
2004-09-30 20:10 ` Alan Cox
2004-09-30 21:25 ` Paul Fulghum
2004-10-01 0:47 ` Paul Fulghum
2004-10-01 15:22 ` Roland Caßebohm
2004-10-01 16:06 ` Paul Fulghum
2004-10-01 20:13 ` Stuart MacDonald
2004-10-01 20:36 ` Paul Fulghum
2004-09-29 14:13 ` Paul Fulghum
2004-10-01 15:25 ` Roland Caßebohm
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