From: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
To: Bhupesh Sharma <bhupesh.sharma@linaro.org>
Cc: MSM <linux-arm-msm@vger.kernel.org>,
linux-crypto@vger.kernel.org, bhupesh.linux@gmail.com,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
devicetree <devicetree@vger.kernel.org>,
Rob Herring <robh+dt@kernel.org>, Andy Gross <agross@kernel.org>,
Herbert Xu <herbert@gondor.apana.org.au>,
"David S . Miller" <davem@davemloft.net>,
Thara Gopinath <thara.gopinath@linaro.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>
Subject: Re: [PATCH v4 18/20] crypto: qce: Defer probing if BAM dma channel is not yet initialized
Date: Thu, 14 Oct 2021 11:42:56 +0300 [thread overview]
Message-ID: <067150f9-3c8c-3b91-718e-33a4019d2d95@linaro.org> (raw)
In-Reply-To: <CAH=2Ntw5_hycMqouneiU_Tb17OL0zxUpt8ecGZn+LxXEU_=ZQg@mail.gmail.com>
Hi Bhupesh,
On 10/14/21 10:40 AM, Bhupesh Sharma wrote:
> Hi Vladimir,
>
> On Thu, 14 Oct 2021 at 02:19, Vladimir Zapolskiy
> <vladimir.zapolskiy@linaro.org> wrote:
>>
>> Hi Bhupesh,
>>
>> On 10/13/21 1:55 PM, Bhupesh Sharma wrote:
>>> Since the Qualcomm qce crypto driver needs the BAM dma driver to be
>>> setup first (to allow crypto operations), it makes sense to defer
>>> the qce crypto driver probing in case the BAM dma driver is not yet
>>> probed.
>>>
>>> Move the code leg requesting dma channels earlier in the
>>> probe() flow. This fixes the qce probe failure issues when both qce
>>> and BMA dma are compiled as static part of the kernel.
>>>
>>> Cc: Thara Gopinath <thara.gopinath@linaro.org>
>>> Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
>>> Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
>>> ---
>>> drivers/crypto/qce/core.c | 20 ++++++++++++--------
>>> 1 file changed, 12 insertions(+), 8 deletions(-)
>>>
>>> diff --git a/drivers/crypto/qce/core.c b/drivers/crypto/qce/core.c
>>> index cb8c77709e1e..c6f686126fc9 100644
>>> --- a/drivers/crypto/qce/core.c
>>> +++ b/drivers/crypto/qce/core.c
>>> @@ -209,9 +209,19 @@ static int qce_crypto_probe(struct platform_device *pdev)
>>> if (ret < 0)
>>> return ret;
>>>
>>> + /* qce driver requires BAM dma driver to be setup first.
>>
>> I believe a multi-line block of comments should be started with '/*' line,
>> for reference please take a look at Documentation/process/coding-style.rst
>
> There are exceptions to this rule as well. For e.g. see most of the
> networking drivers and the multi-line comment styles there :) .
>
> There is a very interesting LWN article on the same :
> https://lwn.net/Articles/694755/
> Note that 'crypto/' and 'drivers/crypto' use these non-standard
> multi-line comments quite often as well.
Ah, yes, I agree here, thank you for the reminder! IIRC crypto drivers
kind of belong to netdev domain, at least in relation to the accepted
coding style.
> That said, I have no strong opinion on using either style. Although, I
> found one of the points raised by the networking maintainer during one
> of my patch reviews earlier quite useful - 'keeping the top line in a
> multi-line comment blank, wastes precious screen space while reading
> and reviewing the patch'.
--
Best wishes,
Vladimir
next prev parent reply other threads:[~2021-10-14 8:43 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-13 10:55 [PATCH v4 00/20] Enable Qualcomm Crypto Engine on sm8250 Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 01/20] arm64/dts: qcom: Fix 'dma' & 'qcom,controlled-remotely' nodes in dts Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 02/20] arm64/dts: qcom: ipq6018: Remove unused 'qcom,config-pipe-trust-reg' property Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 03/20] arm64/dts: qcom: ipq6018: Remove unused 'iface_clk' property from dma-controller node Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 04/20] dt-bindings: qcom-bam: Convert binding to YAML Bhupesh Sharma
2021-10-13 12:56 ` Vladimir Zapolskiy
2021-10-13 17:13 ` Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 05/20] dt-bindings: qcom-bam: Add 'interconnects' & 'interconnect-names' to optional properties Bhupesh Sharma
2021-10-13 13:03 ` Vladimir Zapolskiy
2021-10-13 17:14 ` Bhupesh Sharma
2021-10-13 18:39 ` Rob Herring
2021-10-14 7:03 ` Bhupesh Sharma
2021-10-24 13:55 ` Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 06/20] dt-bindings: qcom-bam: Add 'iommus' " Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 07/20] dt-bindings: qcom-qce: Convert bindings to yaml Bhupesh Sharma
2021-10-13 13:05 ` Vladimir Zapolskiy
2021-10-13 17:15 ` Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 08/20] dt-bindings: qcom-qce: Add 'interconnects' and move 'clocks' to optional properties Bhupesh Sharma
2021-10-26 19:40 ` Rob Herring
2021-10-13 10:55 ` [PATCH v4 09/20] dt-bindings: qcom-qce: Add 'iommus' " Bhupesh Sharma
2021-10-26 19:40 ` Rob Herring
2021-10-13 10:55 ` [PATCH v4 10/20] arm64/dts: qcom: sdm845: Use RPMH_CE_CLK macro directly Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 11/20] dt-bindings: crypto : Add new compatible strings for qcom-qce Bhupesh Sharma
2021-10-18 18:26 ` Rob Herring
2021-10-13 10:55 ` [PATCH v4 12/20] arm64/dts: qcom: Use new compatibles for crypto nodes Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 13/20] dma: qcom: bam_dma: Add support to initialize interconnect path Bhupesh Sharma
2021-10-13 19:15 ` Vladimir Zapolskiy
2021-10-24 13:53 ` Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 14/20] crypto: qce: core: " Bhupesh Sharma
2021-10-13 19:19 ` Vladimir Zapolskiy
2021-10-24 13:53 ` Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 15/20] crypto: qce: Add new compatibles for qce crypto driver Bhupesh Sharma
2021-10-13 19:22 ` Vladimir Zapolskiy
2021-10-20 14:07 ` Thara Gopinath
2021-10-24 13:52 ` Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 16/20] crypto: qce: core: Make clocks optional Bhupesh Sharma
2021-10-13 19:23 ` Vladimir Zapolskiy
2021-10-24 13:34 ` Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 17/20] crypto: qce: Print a failure msg in case probe() fails Bhupesh Sharma
2021-10-13 19:26 ` Vladimir Zapolskiy
2021-10-24 13:33 ` Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 18/20] crypto: qce: Defer probing if BAM dma channel is not yet initialized Bhupesh Sharma
2021-10-13 20:49 ` Vladimir Zapolskiy
2021-10-14 7:40 ` Bhupesh Sharma
2021-10-14 8:42 ` Vladimir Zapolskiy [this message]
2021-10-20 14:10 ` Thara Gopinath
2021-10-24 14:05 ` Bhupesh Sharma
2021-10-13 10:55 ` [PATCH v4 19/20] crypto: qce: Add 'sm8250-qce' compatible string check Bhupesh Sharma
2021-10-20 14:11 ` Thara Gopinath
2021-10-13 10:55 ` [PATCH v4 20/20] arm64/dts: qcom: sm8250: Add dt entries to support crypto engine Bhupesh Sharma
2021-10-20 14:03 ` [PATCH v4 00/20] Enable Qualcomm Crypto Engine on sm8250 Thara Gopinath
2021-10-24 13:58 ` Bhupesh Sharma
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