linux-kernel - Re: [PATCH v6 0/9] iProc I2C slave mode and NIC mode

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Message-ID: <a34e914a-ac8e-421e-f75c-f595bc678219@broadcom.com>
Date:   Wed, 3 Apr 2019 13:56:54 -0700
From:   Ray Jui <ray.jui@...adcom.com>
To:     Wolfram Sang <wsa@...-dreams.de>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>, linux-i2c@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        bcm-kernel-feedback-list@...adcom.com,
        Rayagonda Kokatanur <rayagonda.kokatanur@...adcom.com>
Subject: Re: [PATCH v6 0/9] iProc I2C slave mode and NIC mode

Hi Wolfram,

On 4/3/2019 1:44 PM, Wolfram Sang wrote:
> On Tue, Apr 02, 2019 at 06:18:21PM -0700, Ray Jui wrote:
>> This patch series adds the following support to the iProc I2C driver:
>> - Increase maximum read transfer size to 255 bytes
>> - I2C slave mode
>> - Polling mode
>> - NIC I2C mode
>>
>> This patch series is based on kernel v5.1-rc3 and available at:
>> https://github.com/Broadcom/arm64-linux.git
>> branch: i2c-slave-v6
>>
>> Changes from v5:
>>  - Address various comments from Wolfram
> 
> In the future, please write in detail what you changed. I review so many
> patches that I can't recall all my comments on every patch.
> 

Sure will do next time.

> That being said, all patches applied to for-next, thanks!
> 

Thanks!

> Can be fixed incrementally, my code checkers complain about:
> 
>     CPPCHECK
> drivers/i2c/busses/i2c-bcm-iproc.c:720:14: warning: Shifting signed 32-bit value by 31 bits is undefined behaviour [shiftTooManyBitsSigned]
>     val |= 1 << M_TX_WR_STATUS_SHIFT;
>              ^
> drivers/i2c/busses/i2c-bcm-iproc.c:847:13: warning: Shifting signed 32-bit value by 31 bits is undefined behaviour [shiftTooManyBitsSigned]
>  val &= ~(1 << TIM_CFG_MODE_400_SHIFT);
>             ^
> drivers/i2c/busses/i2c-bcm-iproc.c:998:13: warning: Shifting signed 32-bit value by 31 bits is undefined behaviour [shiftTooManyBitsSigned]
>  val &= ~(1 << TIM_CFG_MODE_400_SHIFT);
> 

I'll submit an incremental patch to fix the above warnings. I think we
can convert all '1 << XXX' syntax in this driver to 'BIT(XXX)'. It will
fix all of the above warnings and make the code more readable.

Thanks,

Ray