Re: [PATCH] staging: fsl-dpaa2: Fix multiple assignments should be avoided

[Randy Dunlap]

On 11/08/2017 03:39 AM, Joe Perches wrote:
> On Wed, 2017-11-08 at 12:40 +0300, Dan Carpenter wrote:
>> On Wed, Nov 08, 2017 at 10:20:48AM +0100, Greg KH wrote:
>>> On Tue, Nov 07, 2017 at 07:45:03PM -0500, Joshua Abraham wrote:
>>>> This patch fixes the checkpatch.pl warning:
>>>> "CHECK: multiple assignments should be avoided"
>>>>
>>>> Signed-off-by: Joshua Abraham <j.abraham1776@xxxxxxxxx>
>>>> ---
>>>>  drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c | 3 ++-
>>>>  1 file changed, 2 insertions(+), 1 deletion(-)
>>>>
>>>> diff --git a/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c b/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c
>>>> index 0d8ed002adcb..384218946108 100644
>>>> --- a/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c
>>>> +++ b/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c
>>>> @@ -1661,7 +1661,8 @@ static void set_fq_affinity(struct dpaa2_eth_priv *priv)
>>>>  	 * This may well change at runtime, either through irqbalance or
>>>>  	 * through direct user intervention.
>>>>  	 */
>>>> -	rx_cpu = txc_cpu = cpumask_first(&priv->dpio_cpumask);
>>>> +	rx_cpu = cpumask_first(&priv->dpio_cpumask);
>>>> +	txc_cpu = rx_cpu;
>>>
>>> The original code here makes much more sense, doesn't it?
>>>
>>> Sometimes checkpatch is wrong :)
>>
>> It feels like the majority of these multiple assignment warnings are
>> wrong.  I thought it would be a good idea at first but after looking at
>> a bunch of the patches it feels like we should just remove the check.
> 
> I don't have a particular opinion one way or another.
> 
> That bit was added to CodingStyle by Randy Dunlap back
> in 2006 by
> 
> commit b3fc9941fbc6efe5cb77728adb0fb12be363e73e
> Author: Randy Dunlap <randy.dunlap@xxxxxxxxxx>
> Date:   Sun Dec 10 02:18:56 2006 -0800
> 
>     [PATCH] CodingStyle updates
>     
>     Add some kernel coding style comments, mostly pulled from emails
>     by Andrew Morton, Jesper Juhl, and Randy Dunlap.
>     
>     - add paragraph on switch/case indentation (with fixes)
>     - add paragraph on multiple-assignments
>     - add more on Braces
>     - add section on Spaces; add typeof, alignof, & __attribute__ with sizeof;
>       add more on postfix/prefix increment/decrement operators
>     - add paragraph on function breaks in source files; add info on
>       function prototype parameter names
>     - add paragraph on EXPORT_SYMBOL placement
>     - add section on /*-comment style, long-comment style, and data
>       declarations and comments
>     - correct some chapter number references that were missed when
>       chapters were renumbered
>     
>     Signed-off-by: Randy Dunlap <randy.dunlap@xxxxxxxxxx>
>     Acked-by: Jesper Juhl <jesper.juhl@xxxxxxxxx>
>     Acked-by: Jan Engelhardt <jengelh@xxxxxx>
>     Signed-off-by: Andrew Morton <akpm@xxxxxxxx>

So it was.  I would certainly support removing it.

I suspect I copied that from someone else's email.  My personal style
would be to allow that.


-- 
~Randy