linux-kernel - Re: [PATCH v2 14/17] dma: qcom: bam_dma: Create a new header file for BAM DMA driver

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Date:   Mon, 10 May 2021 00:50:43 +0530
From:   Bhupesh Sharma <bhupesh.sharma@...aro.org>
To:     Vinod Koul <vkoul@...nel.org>
Cc:     linux-arm-msm@...r.kernel.org,
        Thara Gopinath <thara.gopinath@...aro.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S . Miller" <davem@...emloft.net>,
        Stephen Boyd <sboyd@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        dmaengine@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-crypto@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, bhupesh.linux@...il.com
Subject: Re: [PATCH v2 14/17] dma: qcom: bam_dma: Create a new header file for
 BAM DMA driver

Hi Vinod,

Thanks for the review.

On Sun, 9 May 2021 at 19:28, Vinod Koul <vkoul@...nel.org> wrote:
>
> On 06-05-21, 03:07, Bhupesh Sharma wrote:
> > Create a new header file for BAM DMA driver to make sure
> > that it can be included in the follow-up patch to defer probing
> > drivers which require BAM DMA driver to be first probed successfully.
> >
> > Cc: Thara Gopinath <thara.gopinath@...aro.org>
> > Cc: Bjorn Andersson <bjorn.andersson@...aro.org>
> > Cc: Rob Herring <robh+dt@...nel.org>
> > Cc: Andy Gross <agross@...nel.org>
> > Cc: Herbert Xu <herbert@...dor.apana.org.au>
> > Cc: David S. Miller <davem@...emloft.net>
> > Cc: Stephen Boyd <sboyd@...nel.org>
> > Cc: Michael Turquette <mturquette@...libre.com>
> > Cc: Vinod Koul <vkoul@...nel.org>
> > Cc: dmaengine@...r.kernel.org
> > Cc: linux-clk@...r.kernel.org
> > Cc: linux-crypto@...r.kernel.org
> > Cc: devicetree@...r.kernel.org
> > Cc: linux-kernel@...r.kernel.org
> > Cc: bhupesh.linux@...il.com
> > Signed-off-by: Bhupesh Sharma <bhupesh.sharma@...aro.org>
> > ---
> >  drivers/dma/qcom/bam_dma.c | 283 +-----------------------------------
> >  include/soc/qcom/bam_dma.h | 290 +++++++++++++++++++++++++++++++++++++
>
> 1. Please use -M with move patches...

Oops, will do.

> 2. susbsytem is dmaengine
>
> 3. Why move..? These things are internal to the driver and I dont think
> it is wise for clients to use everything here... If the client needs to
> know defer probe, it should request a channel and check the status
> returned for EPROBE_DEFER

Yes, the main intent is to defer the probe of the calling client driver in
case the BAM DMA is not probed() yet.

Sure, I will make the suggested change in v3,

Regards,
Bhupesh