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Re: [Xen-devel] [PATCH] iommu-remote: Fix lost serial TX interrupts. Rep

To: Trolle Selander <trolle.selander@xxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH] iommu-remote: Fix lost serial TX interrupts. Report receive overruns.
From: "Justin T. Gibbs" <gibbs@xxxxxxxxxxx>
Date: Wed, 03 Mar 2010 16:07:17 -0700
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On 3/3/2010 11:52 AM, Trolle Selander wrote:
> On Thu, Jan 28, 2010 at 6:26 PM, Justin T. Gibbs <gibbs@xxxxxxxxxxx> wrote:
>> This patch corrects emulation errors in QEMU's 16550 uart emulation,
>> which cause compatibility issues with FreeBSD's uart(9) driver.


> I'm assuming the overrun bugs were only triggered when the uart was
> put in loopback mode?

Yes.  The FreeBSD driver puts the uart into loopback mode to probe the
size of the device's FIFO.


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