linux-kernel - Re: [PATCH] dmaengine: dmatest: add a maximum number of test iterations

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Date:	Wed, 22 Jul 2009 21:57:52 -0700
From:	Dan Williams <dan.j.williams@...el.com>
To:	Nicolas Ferre <nicolas.ferre@...el.com>
Cc:	maciej.sosnowski@...el.com, avictor.za@...il.com,
	linux-arm-kernel@...ts.arm.linux.org.uk,
	haavard.skinnemoen@...el.com, patrice.vilchez@...el.com,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] dmaengine: dmatest: add a maximum number of test 
	iterations

On Fri, Jul 3, 2009 at 10:26 AM, Nicolas Ferre<nicolas.ferre@...el.com> wrote:
> The dmatest usually waits for the killing of its kthreads to stop
> running tests.  This patch adds a parameter that sets a maximum
> number of test iterations.
>
> This feature is quite interesting for debugging when you set a lot of
> traces in your dmaengine controller driver.
>
> Signed-off-by: Nicolas Ferre <nicolas.ferre@...el.com>
> ---
>  drivers/dma/dmatest.c |   15 ++++++++++++++-
>  1 files changed, 14 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
> index fb7da51..0131a1f 100644
> --- a/drivers/dma/dmatest.c
> +++ b/drivers/dma/dmatest.c
> @@ -38,6 +38,11 @@ module_param(max_channels, uint, S_IRUGO);
>  MODULE_PARM_DESC(max_channels,
>                "Maximum number of channels to use (default: all)");
>
> +static unsigned int iteration_nbr = 0;
> +module_param(iteration_nbr, uint, S_IRUGO);
> +MODULE_PARM_DESC(iteration_nbr,
> +               "Iteration number before stopping test (default: infinite)");
> +

This is a minor nit, but for a user facing interface I don't think we
should export abbreviated variable names.  I'll apply this with the
following fixups:

s/iteration_nbr/iterations/
s/Iteration number/Iterations/

...as well as a fix for the checkpatch violation of initializing a static to 0.

Thanks,
Dan
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