[PATCH] gpio: remove spurious gpio_unexport debug error.

[Uwe Kleine-König]

Hello,

On Thu, Jul 22, 2010 at 02:05:58PM -0700, Gregory Bean wrote:
> Make gpio_unexport generate success instead of an -EINVAL
> if asked to unexport a line which is not exported, because
> the only result of that condition is a pr_debug
> which complains of what is really a harmless no-op:
> when an unexported gpio is unexported again, nothing happens.
> That's not a failure, just a trivial border case.
> Since gpio_free calls gpio_unexport unconditionally
> and exported gpio lines are uncommon, most calls to
> gpio_free with debug flags enabled generate -EINVAL
> warnings in the log, causing unnecessary stress.
I noticed that a few days ago, too.  Just didn't come around to fix it
myself.
 
> Signed-off-by: Gregory Bean <gbean at codeaurora.org>
Acked-by: Uwe Kleine-König <u.kleine-koenig at pengutronix.de>

Thanks
Uwe

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