linux-kernel - Re: [Outreachy kernel] [PATCH 4/5] staging: sm750fb: Remove unnecessary else after return

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Date:   Wed, 1 Mar 2017 00:26:45 +0530
From:   SIMRAN SINGHAL <singhalsimran0@...il.com>
To:     Julia Lawall <julia.lawall@...6.fr>
Cc:     Greg KH <gregkh@...uxfoundation.org>,
        lustre-devel@...ts.lustre.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org, linux-fbdev@...r.kernel.org,
        outreachy-kernel@...glegroups.com
Subject: Re: [Outreachy kernel] [PATCH 4/5] staging: sm750fb: Remove
 unnecessary else after return

On Tue, Feb 28, 2017 at 2:45 AM, Julia Lawall <julia.lawall@...6.fr> wrote:
>
>
> On Mon, 27 Feb 2017, simran singhal wrote:
>
>> This patch fixes the checkpatch warning that else is not generally
>> useful after a break or return.
>>
>> This was done using Coccinelle:
>> @@
>> expression e2;
>> statement s1;
>> @@
>> if(e2) { ... return ...; }
>> -else
>>          s1
>>
>> Signed-off-by: simran singhal <singhalsimran0@...il.com>
>> ---
>>  drivers/staging/sm750fb/ddk750_sii164.c | 6 ++----
>>  drivers/staging/sm750fb/ddk750_swi2c.c  | 6 ++----
>>  2 files changed, 4 insertions(+), 8 deletions(-)
>>
>> diff --git a/drivers/staging/sm750fb/ddk750_sii164.c b/drivers/staging/sm750fb/ddk750_sii164.c
>> index 259006a..6906598 100644
>> --- a/drivers/staging/sm750fb/ddk750_sii164.c
>> +++ b/drivers/staging/sm750fb/ddk750_sii164.c
>> @@ -368,8 +368,7 @@ unsigned char sii164IsConnected(void)
>>       hotPlugValue = i2cReadReg(SII164_I2C_ADDRESS, SII164_DETECT) & SII164_DETECT_HOT_PLUG_STATUS_MASK;
>>       if (hotPlugValue == SII164_DETECT_HOT_PLUG_STATUS_ON)
>>               return 1;
>> -     else
>> -             return 0;
>> +     return 0;
>
>
> Totally unrelated to what you are doing, but I wonder if these return
> values should be true and false?  Perhaps it would help to see how the
> return values are used at the calling context.
>
you want me to go ahead with what Joe mentioned and also do the same
changes here also.
> julia
>
>>  }
>>
>>  /*
>> @@ -387,8 +386,7 @@ unsigned char sii164CheckInterrupt(void)
>>       detectReg = i2cReadReg(SII164_I2C_ADDRESS, SII164_DETECT) & SII164_DETECT_MONITOR_STATE_MASK;
>>       if (detectReg == SII164_DETECT_MONITOR_STATE_CHANGE)
>>               return 1;
>> -     else
>> -             return 0;
>> +     return 0;
>>  }
>>
>>  /*
>> diff --git a/drivers/staging/sm750fb/ddk750_swi2c.c b/drivers/staging/sm750fb/ddk750_swi2c.c
>> index a4ac07c..5997349 100644
>> --- a/drivers/staging/sm750fb/ddk750_swi2c.c
>> +++ b/drivers/staging/sm750fb/ddk750_swi2c.c
>> @@ -199,8 +199,7 @@ static unsigned char sw_i2c_read_sda(void)
>>       gpio_data = peek32(sw_i2c_data_gpio_data_reg);
>>       if (gpio_data & (1 << sw_i2c_data_gpio))
>>               return 1;
>> -     else
>> -             return 0;
>> +     return 0;
>>  }
>>
>>  /*
>> @@ -295,8 +294,7 @@ static long sw_i2c_write_byte(unsigned char data)
>>
>>       if (i < 0xff)
>>               return 0;
>> -     else
>> -             return -1;
>> +     return -1;
>>  }
>>
>>  /*
>> --
>> 2.7.4
>>
>> --
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