From: lsorense@csclub.uwaterloo.ca (Lennart Sorensen)
To: Breno Leitao <leitao@linux.vnet.ibm.com>
Cc: Lennart Sorensen <lsorense@csclub.uwaterloo.ca>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: Very strange data loss with jsm driver
Date: Tue, 2 Aug 2011 10:22:25 -0400 [thread overview]
Message-ID: <20110802142225.GO8562@caffeine.csclub.uwaterloo.ca> (raw)
In-Reply-To: <4E380710.1010204@linux.vnet.ibm.com>
On Tue, Aug 02, 2011 at 11:17:52AM -0300, Breno Leitao wrote:
> Well, I finally tested it over here, and what I found is:
>
> If the line has a \r among the first 16 bytes, then the information
> is TXed immediately. If there is no \r in the first 16 bytes, then the
> information seems to be buffered.
Where in the driver is this happening?
> So, it seems that that the patch should ask the driver to TX the
> information when we receive a \r or when the buffer is full. Does it
> make sense to you ?
Not sure. I just wonder why the data is disappearing rather than getting
buffered somewhere. Clearly the other serial drivers are doing that
successfully.
I don't even know why the driver should care about the contents at all.
Just send data when it is ready.
--
Len Sorensen
next prev parent reply other threads:[~2011-08-02 14:22 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-29 16:04 Very strange data loss with jsm driver Lennart Sorensen
2011-07-29 16:27 ` Alan Cox
2011-07-29 16:53 ` Lennart Sorensen
2011-07-29 18:06 ` Lennart Sorensen
2011-07-29 18:14 ` Alan Cox
2011-07-29 18:13 ` Lennart Sorensen
2011-08-02 14:17 ` Breno Leitao
2011-08-02 14:22 ` Lennart Sorensen [this message]
2011-08-02 14:23 ` Lennart Sorensen
2011-08-02 14:49 ` Breno Leitao
2011-08-02 14:52 ` Lennart Sorensen
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