linux-kernel - Re: [PATCH v3 7/9] dmaengine: dw: platform: power on device on shutdown

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Date:	Tue, 8 Dec 2015 22:55:34 +0530
From:	Vinod Koul <vinod.koul@...el.com>
To:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:	"Rafael J . Wysocki" <rjw@...ysocki.net>,
	linux-acpi@...r.kernel.org, dmaengine@...r.kernel.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
	linux-kernel@...r.kernel.org,
	Mika Westerberg <mika.westerberg@...ux.intel.com>
Subject: Re: [PATCH v3 7/9] dmaengine: dw: platform: power on device on
 shutdown

On Fri, Dec 04, 2015 at 11:49:23PM +0200, Andy Shevchenko wrote:
> We have to call dw_dma_disable() to stop any ongoing transfer. On some
> platforms we can't do that since DMA device is powered off. Moreover we have no
> possibility at that point to check if the platform is affected or not. That's
> why we call pm_runtime_get_sync() / pm_runtime_put() unconditionally. On the
> other hand we can't use pm_runtime_suspended() because runtime PM framework is
> not fully used by the driver.
 
Acked-by: Vinod Koul <vinod.koul@...el.com>

-- 
~Vinod
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