linux-kernel - Re: [Outreachy kernel] [PATCH v2] Staging: irda: Don't use assignment inside if statement

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Message-ID: <CAB3L5oxr5K5aMo06ROCVV9ejY6a_g1+uUkjU=Z5bKTJtzUs7sA@mail.gmail.com>
Date:   Sat, 16 Sep 2017 02:37:37 +0530
From:   Srishti Sharma <srishtishar@...il.com>
To:     Julia Lawall <julia.lawall@...6.fr>
Cc:     samuel@...tiz.org, Greg KH <gregkh@...uxfoundation.org>,
        netdev@...r.kernel.org, devel@...verdev.osuosl.org,
        Linux kernel mailing list <linux-kernel@...r.kernel.org>,
        outreachy-kernel@...glegroups.com
Subject: Re: [Outreachy kernel] [PATCH v2] Staging: irda: Don't use assignment
 inside if statement

On Sat, Sep 16, 2017 at 1:30 AM, Julia Lawall <julia.lawall@...6.fr> wrote:
>
>
> On Sat, 16 Sep 2017, Srishti Sharma wrote:
>
>> Write assignment statement outside the if statement. Done using
>> the following semantic patch by coccinelle.
>>
>> @@
>> identifier E;
>> expression F;
>> statement S;
>> @@
>>
>> -if((E = F))
>> +E = F;
>> +if(E)
>>   S
>>
>> Signed-off-by: Srishti Sharma <srishtishar@...il.com>
>
> Acked-by: Julia Lawall <julia.lawall@...6.fr>

Have sent a patchset for this instead .

Regards,
Srishti
>
>> ---
>> Changes in v2:
>>  -Semicolon was missing in one of the statements of the
>>   semantic patch
>>
>>  drivers/staging/irda/drivers/irda-usb.c | 4 ++--
>>  drivers/staging/irda/drivers/mcs7780.c  | 9 ++++++---
>>  drivers/staging/irda/net/irqueue.c      | 3 ++-
>>  3 files changed, 10 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/staging/irda/drivers/irda-usb.c b/drivers/staging/irda/drivers/irda-usb.c
>> index 723e49b..82bfc05 100644
>> --- a/drivers/staging/irda/drivers/irda-usb.c
>> +++ b/drivers/staging/irda/drivers/irda-usb.c
>> @@ -334,9 +334,9 @@ static void irda_usb_change_speed_xbofs(struct irda_usb_cb *self)
>>       urb->transfer_flags = 0;
>>
>>       /* Irq disabled -> GFP_ATOMIC */
>> -     if ((ret = usb_submit_urb(urb, GFP_ATOMIC))) {
>> +     ret = usb_submit_urb(urb, GFP_ATOMIC);
>> +     if (ret)
>>               net_warn_ratelimited("%s(), failed Speed URB\n", __func__);
>> -     }
>>  }
>>
>>  /*------------------------------------------------------------------*/
>> diff --git a/drivers/staging/irda/drivers/mcs7780.c b/drivers/staging/irda/drivers/mcs7780.c
>> index c3f0b25..2b674d5 100644
>> --- a/drivers/staging/irda/drivers/mcs7780.c
>> +++ b/drivers/staging/irda/drivers/mcs7780.c
>> @@ -605,19 +605,22 @@ static int mcs_speed_change(struct mcs_cb *mcs)
>>       if (mcs->new_speed <= 115200) {
>>               rval &= ~MCS_FIR;
>>
>> -             if ((rst = (mcs->speed > 115200)))
>> +             rst = (mcs->speed > 115200);
>> +             if (rst)
>>                       mcs_set_reg(mcs, MCS_MINRXPW_REG, 0);
>>
>>       } else if (mcs->new_speed <= 1152000) {
>>               rval &= ~MCS_FIR;
>>
>> -             if ((rst = !(mcs->speed == 576000 || mcs->speed == 1152000)))
>> +             rst = !(mcs->speed == 576000 || mcs->speed == 1152000);
>> +             if (rst)
>>                       mcs_set_reg(mcs, MCS_MINRXPW_REG, 5);
>>
>>       } else {
>>               rval |= MCS_FIR;
>>
>> -             if ((rst = (mcs->speed != 4000000)))
>> +             rst = (mcs->speed != 4000000);
>> +             if (rst)
>>                       mcs_set_reg(mcs, MCS_MINRXPW_REG, 5);
>>
>>       }
>> diff --git a/drivers/staging/irda/net/irqueue.c b/drivers/staging/irda/net/irqueue.c
>> index 160dc89..5aab072 100644
>> --- a/drivers/staging/irda/net/irqueue.c
>> +++ b/drivers/staging/irda/net/irqueue.c
>> @@ -217,7 +217,8 @@ static __u32 hash( const char* name)
>>
>>       while(*name) {
>>               h = (h<<4) + *name++;
>> -             if ((g = (h & 0xf0000000)))
>> +             g = (h & 0xf0000000);
>> +             if (g)
>>                       h ^=g>>24;
>>               h &=~g;
>>       }
>> --
>> 2.7.4
>>
>> --
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>>