linux-kernel - Re: [PATCH] dma: coh901318: fix function return types build warnings

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Date:	Wed, 14 Jan 2015 16:23:09 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	dmaengine@...r.kernel.org, Vinod Koul <vinod.koul@...el.com>,
	Dan Williams <dan.j.williams@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>
Subject: Re: [PATCH] dma: coh901318: fix function return types build warnings

On Tue, Jan 13, 2015 at 10:17 PM, Arnd Bergmann <arnd@...db.de> wrote:

> A recent patch that removed coh901318_control() replaced it
> with a number of pointers to existing functions, but those
> unfortunately have the wrong return  type and need to be
> changed to return an 'int' with an error value rather than
> a 'void' to avoid these build warnings:
>
> drivers/dma/coh901318.c:2697:32: warning: assignment from incompatible pointer type
>   base->dma_slave.device_config = coh901318_dma_set_runtimeconfig;
>                                 ^
> drivers/dma/coh901318.c:2698:31: warning: assignment from incompatible pointer type
>   base->dma_slave.device_pause = coh901318_pause;
>                                ^
> drivers/dma/coh901318.c:2699:32: warning: assignment from incompatible pointer type
>   base->dma_slave.device_resume = coh901318_resume
>
> The coh901318_base_init function has the correct return type
> already, but needs to be marked 'static' to avoid a sparse
> warning about a missing declaration.
>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Fixes: 6782af118b6c ("dmaengine: coh901318: Split device_control")

Acked-by: Linus Walleij <linus.walleij@...aro.org>

Yours,
Linus Walleij
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