linux-kernel - Re: [PATCH v9 05/11] crypto: qce

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Message-ID: <b1d8234a-6d29-49f6-bfc7-bdc738895d79@oss.qualcomm.com>
Date: Fri, 28 Nov 2025 13:01:52 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Bartosz Golaszewski <brgl@...ev.pl>, Vinod Koul <vkoul@...nel.org>,
        Jonathan Corbet <corbet@....net>,
        Thara Gopinath <thara.gopinath@...il.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Udit Tiwari <quic_utiwari@...cinc.com>,
        Daniel Perez-Zoghbi <dperezzo@...cinc.com>,
        Md Sadre Alam <mdalam@....qualcomm.com>,
        Dmitry Baryshkov <lumag@...nel.org>
Cc: dmaengine@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-crypto@...r.kernel.org,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [PATCH v9 05/11] crypto: qce - Remove unused ignore_buf

On 11/28/25 12:44 PM, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> 
> It's unclear what the purpose of this field is. It has been here since
> the initial commit but without any explanation. The driver works fine
> without it. We still keep allocating more space in the result buffer, we
> just don't need to store its address. While at it: move the
> QCE_IGNORE_BUF_SZ definition into dma.c as it's not used outside of this
> compilation unit.

It's apparently used downstream, at a glance to work around some oddities

https://github.com/cupid-development/android_kernel_xiaomi_sm8450/blob/lineage-22.2/drivers/crypto/msm/qce50.c

Konrad