linux-kernel - Re: [PATCH 7/7] staging: cxt1e1: remove unneeded a value

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Message-ID: <CAHb8M2Cb7Ps2Pv_CEKO0S-4vY-3VwcZO8H+xFiQFyfbYL5-Yrw@mail.gmail.com>
Date:	Thu, 6 Mar 2014 16:47:41 +0900
From:	DaeSeok Youn <daeseok.youn@...il.com>
To:	Tobias Klauser <tklauser@...tanz.ch>
Cc:	Greg KH <gregkh@...uxfoundation.org>,
	devel <devel@...verdev.osuosl.org>,
	Shaun Laing <shaun@...source.ca>,
	"sachin.kamat" <sachin.kamat@...aro.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Dulshani Gunawardhana <dulshani.gunawardhana89@...il.com>,
	"ying.xue" <ying.xue@...driver.com>,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH 7/7] staging: cxt1e1: remove unneeded a value

Ok.
I will use sizeof(name) for snprintf() call.

Thanks.
Daeseok Youn.

2014-03-06 16:33 GMT+09:00 Tobias Klauser <tklauser@...tanz.ch>:
> On 2014-03-06 at 08:19:19 +0100, DaeSeok Youn <daeseok.youn@...il.com> wrote:
>> 2014-03-05 19:13 GMT+09:00 Tobias Klauser <tklauser@...tanz.ch>:
>> > On 2014-03-05 at 02:24:22 +0100, Daeseok Youn <daeseok.youn@...il.com> wrote:
>> >>
>> >> It doesn't need to assign name array address to np pointer.
>> >>
>> >> Signed-off-by: Daeseok Youn <daeseok.youn@...il.com>
>> >> ---
>> >>  drivers/staging/cxt1e1/linux.c |    5 ++---
>> >>  1 files changed, 2 insertions(+), 3 deletions(-)
>> >>
>> >> diff --git a/drivers/staging/cxt1e1/linux.c b/drivers/staging/cxt1e1/linux.c
>> >> index 5bb42ae..cae8c66 100644
>> >> --- a/drivers/staging/cxt1e1/linux.c
>> >> +++ b/drivers/staging/cxt1e1/linux.c
>> >> @@ -205,15 +205,14 @@ status_t
>> >>  c4_wq_port_init(mpi_t *pi)
>> >>  {
>> >>
>> >> -     char        name[16], *np;  /* NOTE: name of the queue limited by system
>> >> +     char        name[16];  /* NOTE: name of the queue limited by system
>> >>                                    * to 10 characters */
>> >>
>> >>       if (pi->wq_port)
>> >>               return 0;                   /* already initialized */
>> >>
>> >> -     np = name;
>> >>       memset(name, 0, 16);
>> >
>> > This isn't necessary since s{,n}printf() adds a terminating '\0'.
>> Yes, I have looked at lib/vsprintf.c. I found it adds null to a string
>> in the end of vsnprintf() function.
>> I will remove memset() line.
>>
>> >
>> >> -     sprintf(np, "%s%d", pi->up->devname, pi->portnum); /* IE pmcc4-01) */
>> >> +     sprintf(name, "%s%d", pi->up->devname, pi->portnum); /* IE pmcc4-01) */
>> >
>> > Better use snprintf() here, even if the comment above claims the name
>> > never to be no longer than 10 characters.
>> OK. I will replace sprintf with snprintf() and set a string length to "10".
>
> It's probably fine to leave the string at length 16 (since there's also
> a number appended to it) and the use sizeof(name) for the snprintf call.
>
> Cheers
> Tobias
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