From: Andreas Oberritter <obi@linuxtv.org>
To: Dan Carpenter <error27@gmail.com>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>,
linux-media@vger.kernel.org, kernel-janitors@vger.kernel.org,
Oliver Endriss <o.endriss@gmx.de>
Subject: Re: [patch] [media] av7110: make array offset unsigned
Date: Fri, 07 Jan 2011 14:05:00 +0000 [thread overview]
Message-ID: <4D271D8C.2060201@linuxtv.org> (raw)
In-Reply-To: <20110107135122.GI1717@bicker>
On 01/07/2011 02:51 PM, Dan Carpenter wrote:
> On Fri, Jan 07, 2011 at 01:44:15PM +0100, Andreas Oberritter wrote:
>> Nack. You're changing an interface to userspace. Please add a check to
>> av7110_ca.c instead.
>>
>
> Ok. I've done that and resent the patch.
Thanks. I'm OK with the patch, but I'll leave it to the maintainer of
av7110 to decide whether he likes the cast or prefers an additional
signed compare. I added him to CC.
> But just for my own understanding, why is it wrong to change an int to
> an unsigned int in the userspace API? Who would notice? (I'm still
> quite a newbie at system programming).
It would generate compiler warnings in userspace for programs checking
for values < 0 or assigning negative values (for whatever reason).
Regards,
Andreas
WARNING: multiple messages have this Message-ID (diff)
From: Andreas Oberritter <obi@linuxtv.org>
To: Dan Carpenter <error27@gmail.com>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>,
linux-media@vger.kernel.org, kernel-janitors@vger.kernel.org,
Oliver Endriss <o.endriss@gmx.de>
Subject: Re: [patch] [media] av7110: make array offset unsigned
Date: Fri, 07 Jan 2011 15:05:00 +0100 [thread overview]
Message-ID: <4D271D8C.2060201@linuxtv.org> (raw)
In-Reply-To: <20110107135122.GI1717@bicker>
On 01/07/2011 02:51 PM, Dan Carpenter wrote:
> On Fri, Jan 07, 2011 at 01:44:15PM +0100, Andreas Oberritter wrote:
>> Nack. You're changing an interface to userspace. Please add a check to
>> av7110_ca.c instead.
>>
>
> Ok. I've done that and resent the patch.
Thanks. I'm OK with the patch, but I'll leave it to the maintainer of
av7110 to decide whether he likes the cast or prefers an additional
signed compare. I added him to CC.
> But just for my own understanding, why is it wrong to change an int to
> an unsigned int in the userspace API? Who would notice? (I'm still
> quite a newbie at system programming).
It would generate compiler warnings in userspace for programs checking
for values < 0 or assigning negative values (for whatever reason).
Regards,
Andreas
next prev parent reply other threads:[~2011-01-07 14:05 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-06 19:41 [patch] [media] av7110: make array offset unsigned Dan Carpenter
2011-01-06 19:41 ` Dan Carpenter
2011-01-07 12:44 ` Andreas Oberritter
2011-01-07 12:44 ` Andreas Oberritter
2011-01-07 13:46 ` [patch v2] [media] av7110: check for negative array offset Dan Carpenter
2011-01-07 13:46 ` Dan Carpenter
2011-01-07 19:01 ` Oliver Endriss
2011-01-07 19:01 ` Oliver Endriss
2011-01-07 19:41 ` [patch v3] " Dan Carpenter
2011-01-07 19:41 ` Dan Carpenter
2011-01-12 12:44 ` walter harms
2011-01-12 13:30 ` Jorge Merlino
2011-01-12 15:49 ` walter harms
2011-01-07 13:51 ` [patch] [media] av7110: make array offset unsigned Dan Carpenter
2011-01-07 13:51 ` Dan Carpenter
2011-01-07 14:02 ` Vasiliy Kulikov
2011-01-07 14:02 ` Vasiliy Kulikov
2011-01-07 14:05 ` Andreas Oberritter [this message]
2011-01-07 14:05 ` Andreas Oberritter
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