linux-kernel - Re: [PATCH] i2c: stm32f7: Make structure stm32f7_i2c

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Date:   Wed, 4 Sep 2019 09:47:07 +0200
From:   Pierre Yves MORDRET <pierre-yves.mordret@...com>
To:     Wolfram Sang <wsa@...-dreams.de>,
        Nishka Dasgupta <nishkadg.linux@...il.com>
CC:     <mcoquelin.stm32@...il.com>, <alexandre.torgue@...com>,
        <linux-i2c@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] i2c: stm32f7: Make structure stm32f7_i2c_algo constant

Hi Wolfram

Sorry for the delay.

Acked-by: Pierre-Yves MORDRET <pierre-yves.mordret@...com>

BR

On 9/3/19 8:05 PM, Wolfram Sang wrote:
> On Thu, Aug 15, 2019 at 11:28:57AM +0530, Nishka Dasgupta wrote:
>> Static structure stm32f7_i2c_algo, of type i2c_algorithm, is used only
>> when it is assigned to constant field algo of a variable having type
>> i2c_adapter. As stm32f7_i2c_algo is therefore never modified, make it
>> const as well to protect it from unintended modification.
>> Issue found with Coccinelle.
>>
>> Signed-off-by: Nishka Dasgupta <nishkadg.linux@...il.com>
>> ---
> 
> Are you guys okay with this patch?
> 
>>  drivers/i2c/busses/i2c-stm32f7.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c
>> index 266d1c269b83..d36cf08461f7 100644
>> --- a/drivers/i2c/busses/i2c-stm32f7.c
>> +++ b/drivers/i2c/busses/i2c-stm32f7.c
>> @@ -1809,7 +1809,7 @@ static u32 stm32f7_i2c_func(struct i2c_adapter *adap)
>>  		I2C_FUNC_SMBUS_I2C_BLOCK;
>>  }
>>  
>> -static struct i2c_algorithm stm32f7_i2c_algo = {
>> +static const struct i2c_algorithm stm32f7_i2c_algo = {
>>  	.master_xfer = stm32f7_i2c_xfer,
>>  	.smbus_xfer = stm32f7_i2c_smbus_xfer,
>>  	.functionality = stm32f7_i2c_func,
>> -- 
>> 2.19.1
>>