Re: [PATCH 04/10] spi: dw-mid: follow new DMAengine workflow

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Wed, 2014-09-24 at 09:44 +0100, Mark Brown wrote:
> On Thu, Sep 18, 2014 at 08:08:54PM +0300, Andy Shevchenko wrote:
> > Though intel-mid-dma does not follow a new DMA workflow let's prepare SPI DW
> > driver for that.
> 
> I don't understand what this change is supposed to do - what is "a new
> DMA workflow"?


The client is obliged to call dma_async_issue_pending() which starts the
actual transfers. Old DMA drivers do not follow this, since requirement
was introduced in 2011 IIRC.

Current DMA driver for spi-dw doesn't follow this, but dw_dmac does.

-- 
Andy Shevchenko <andriy.shevchenko@xxxxxxxxx>
Intel Finland Oy

--
To unsubscribe from this list: send the line "unsubscribe dmaengine" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux Kernel]     [Linux ARM (vger)]     [Linux ARM MSM]     [Linux Omap]     [Linux Arm]     [Linux Tegra]     [Fedora ARM]     [Linux for Samsung SOC]     [eCos]     [Linux PCI]     [Linux Fastboot]     [Gcc Help]     [Git]     [DCCP]     [IETF Announce]     [Security]     [Linux MIPS]     [Yosemite Campsites]

  Powered by Linux