From: Mark Brown <broonie@opensource.wolfsonmicro.com>
To: Joe Perches <joe@perches.com>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>,
"James E.J. Bottomley" <JBottomley@parallels.com>,
linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: drivers: Probable misuses of ||
Date: Fri, 4 May 2012 23:13:33 +0100 [thread overview]
Message-ID: <20120504221333.GU14230@opensource.wolfsonmicro.com> (raw)
In-Reply-To: <1336169378.11505.10.camel@joe2Laptop>
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On Fri, May 04, 2012 at 03:09:38PM -0700, Joe Perches wrote:
> On Fri, 2012-05-04 at 23:02 +0100, Mark Brown wrote:
> > On Fri, May 04, 2012 at 02:54:37PM -0700, Joe Perches wrote:
> > > > drivers/media/rc/fintek-cir.c: if ((chip != 0x0408) || (chip != 0x0804))
> > It'd probably help if you were to supply more analysis as to what the
> > issues you think you're seeing are - in the cases quoted above
> > (especially the last one) there's no obvious bug without further
> > analysis.
> Likely the || should be &&.
> if (val != foo || test != bar)
> is always true when foo != bar
Right, but you need to look at the code and explain why this is a
problem. For example, the case I've left quoted above reads to me like
the intention is "If the chip isn't one I know doesn't like this then
let's do it" which is a perfectly sensible thing to write.
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next prev parent reply other threads:[~2012-05-04 22:13 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-04 23:00 drivers: Probable misuses of || Joe Perches
2012-05-04 21:54 ` Joe Perches
2012-05-04 22:02 ` Mark Brown
2012-05-04 22:09 ` Joe Perches
2012-05-04 22:13 ` Mark Brown [this message]
2012-05-05 16:00 ` Guenter Roeck
2012-05-07 8:36 ` Mark Brown
2012-05-07 16:20 ` Joe Perches
2012-05-07 16:34 ` Mark Brown
2012-05-04 22:56 ` Alan Cox
2012-05-04 23:13 ` Joe Perches
2012-05-04 22:45 ` richard -rw- weinberger
2012-05-07 10:45 ` Mauro Carvalho Chehab
2012-05-07 15:22 ` [PATCH] re: drivers: Probable misuses of || - it913x.c Malcolm Priestley
2012-05-07 11:04 ` drivers: Probable misuses of || Mauro Carvalho Chehab
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