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From: "Ira W. Snyder" <iws@ovro•caltech.edu>
To: Felix Radensky <felix@embedded-sol•com>
Cc: "linuxppc-dev@ozlabs•org" <linuxppc-dev@ozlabs•org>
Subject: Re: [PATCH 0/8] fsldma: lockup fixes
Date: Mon, 28 Feb 2011 09:16:24 -0800	[thread overview]
Message-ID: <20110228171624.GA24900@ovro.caltech.edu> (raw)
In-Reply-To: <4D6B88C6.2000404@embedded-sol.com>

On Mon, Feb 28, 2011 at 01:36:38PM +0200, Felix Radensky wrote:
> Hi Ira,
> 
> I've tried your patches with linux-2.6.38-rc6 on P2020RDB.
> DMA test fails with the following errors if threads_per_chan != 1
> 
> dma0chan0-copy1: terminating after 1 tests, 1 failures (status 0)
> dma0chan0-copy2: #0: test timed out
> 
> I've run the test like this:
> 
> modprobe dmatest threads_per_chan=2 iterations=1
> 

Thanks Felix. This works fine on the 83xx DMA controller. When you have
a chance, can you add "#define DEBUG 1" as the first line of
drivers/dma/fsldma.c and then rerun your test with:

modprobe dmatest threads_per_chan=2 iterations=1 max_channels=1

And send me the dmesg output.

I don't quite understand the difference between links and lists in the
85xx controller yet. I'll work my way through the datasheet this morning
and send out a fixed patch.

Thanks very much for running the tests!

Ira

next prev parent reply	other threads:[~2011-02-28 17:16 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-02-28 11:36 [PATCH 0/8] fsldma: lockup fixes Felix Radensky
2011-02-28 17:16 ` Ira W. Snyder [this message]
  -- strict thread matches above, loose matches on Subject: below --
2011-02-28 18:47 Felix Radensky
2011-02-28 19:53 ` Ira W. Snyder
2011-02-28 20:15   ` Felix Radensky
2011-02-28 21:11     ` Ira W. Snyder
2011-02-28 21:27       ` Felix Radensky
2011-03-01  0:21         ` Ira W. Snyder
2011-03-01  5:46           ` Felix Radensky
2011-03-01  5:52           ` Felix Radensky
2011-03-01 16:55             ` Ira W. Snyder
2011-03-01 19:52               ` Ira W. Snyder
2011-03-02  5:49                 ` Felix Radensky
2011-03-02 16:42                   ` Ira W. Snyder
2011-02-26  0:23 Ira W. Snyder

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