linux-kernel - Re: question about drivers/dma/dma-jz4780.c

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Message-ID: <alpine.DEB.2.02.1507240849270.2225@localhost6.localdomain6>
Date:	Fri, 24 Jul 2015 08:49:40 +0200 (CEST)
From:	Julia Lawall <julia.lawall@...6.fr>
To:	Vinod Koul <vinod.koul@...el.com>
cc:	Julia Lawall <julia.lawall@...6.fr>,
	Alex Smith <alex.smith@...tec.com>, Zubair.Kakakhel@...tec.com,
	dmaengine@...r.kernel.org,
	Vaishali Thakkar <vthakkar1994@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: question about drivers/dma/dma-jz4780.c

On Fri, 24 Jul 2015, Vinod Koul wrote:

> On Fri, Jul 24, 2015 at 07:51:28AM +0200, Julia Lawall wrote:
> > > Yes for dmaengine drivers I do ask this question which typically ends up in
> > > driver invoking devm_irq_free() in driver's remove callback
> > > 
> > > IMHO don't think devm irq calls are very useful, they do make stuff
> > > complicate
> > 
> > Would it be better then to just go back to request_irq (or whatever is
> > appropriate in this case).  It would seem that the devm property can never
> > be relied on, so there is no point to use it.
> 
> Yes I do think that is right way in this case

Thanks for your help.

julia
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