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Re: [PATCH v2] dmaengine: edma: Align the memcpy acnt array size with the transfer

From Vinod Koul <vinod.koul@intel.com>
Newsgroups linux.kernel
Subject Re: [PATCH v2] dmaengine: edma: Align the memcpy acnt array size with the transfer
Date 2017-09-21 19:20 +0200
Message-ID <usdiO-3Se-23@gated-at.bofh.it> (permalink)
References <uqZrA-3BU-7@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Mon, Sep 18, 2017 at 11:16:26AM +0300, Peter Ujfalusi wrote:
> Memory to Memory transfers does not have any special alignment needs
> regarding to acnt array size, but if one of the areas are in memory mapped
> regions (like PCIe memory), we need to make sure that the acnt array size
> is aligned with the mem copy parameters.
> 
> Before "dmaengine: edma: Optimize memcpy operation" change the memcpy was set
> up in a different way: acnt == number of bytes in a word based on
> __ffs((src | dest | len), bcnt and ccnt for looping the necessary number of
> words to comlete the trasnfer.
> 
> Instead of reverting the commit we can fix it to make sure that the ACNT size
> is aligned to the traswnfer.

Applied, thanks

-- 
~Vinod

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[PATCH v2] dmaengine: edma: Align the memcpy acnt array size with the transfer Peter Ujfalusi <peter.ujfalusi@ti.com> - 2017-09-18 10:20 +0200
  Re: [PATCH v2] dmaengine: edma: Align the memcpy acnt array size  with the transfer Vinod Koul <vinod.koul@intel.com> - 2017-09-21 19:20 +0200

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