linux-kernel - Re: [PATCH v2] dmaengine: qcom_hidma: Remove useless DMA-32 fallback configuration

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Date:   Sat, 19 Mar 2022 15:55:18 -0400
From:   Sinan Kaya <okaya@...nel.org>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Vinod Koul <vkoul@...nel.org>
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, dmaengine@...r.kernel.org
Subject: Re: [PATCH v2] dmaengine: qcom_hidma: Remove useless DMA-32 fallback
 configuration

On 3/19/2022 2:24 AM, Christophe JAILLET wrote:
> Le 22/01/2022 à 19:05, Sinan Kaya a écrit :
>> On 1/15/2022 2:35 AM, Christophe JAILLET wrote:
>>> As stated in [1], dma_set_mask() with a 64-bit mask never fails if
>>> dev->dma_mask is non-NULL.
>>> So, if it fails, the 32 bits case will also fail for the same reason.
>>>
>>> Simplify code and remove some dead code accordingly.
>>>
>>> [1]: 
>>> https://lore.kernel.org/linux-kernel/YL3vSPK5DXTNvgdx@infradead.org/#t
>>>
>>
>> Can we please document this?
> 
> Hi, the patch has been applied, but [1] is sometimes given as an 
> explanation link.
> 
> CJ
> 
> 
> [1]: 
> https://lists.linuxfoundation.org/pipermail/iommu/2019-February/033674.html

Sounds good, please carry my

Acked-By: Sinan Kaya <okaya@...nel.org>