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From: Zhang Rui <rui.zhang@intel.com>
To: Pavel Machek <pavel@suse.cz>
Cc: Len Brown <lenb@kernel.org>,
	"stable@kernel.org" <stable@kernel.org>,
	"linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [STABLE PATCH .26 .27] ACPI: avoid empty file name in sysfs
Date: Mon, 17 Nov 2008 09:40:12 +0800	[thread overview]
Message-ID: <1226886012.15014.231.camel@rzhang-dt> (raw)
In-Reply-To: <20081115171725.GB1523@ucw.cz>

On Sun, 2008-11-16 at 01:17 +0800, Pavel Machek wrote:
> Hi!
> 
> > upstream 4feba70a2c1a1a0c96909f657f48b2e11e682370
> > 
> > Since commit bc45b1d39a925b56796bebf8a397a0491489d85c acpi tables are
> > allowed to have an empty signature and /sys/firmware/acpi/tables uses the
> > signature as filename.  Applications using naive recursion through /sys
> > loop forever.  A possible solution would be: (replacing the zero length
> > filename with the string "NULL")
> 
> What about using some string that is not a valid table name? Shorter
> than 4 characters? AFAICT,
> 'NULL' table could be added to acpi in future...?
> 
> What if *two* tales have empty signature?
there are "NULL1" and "NULL2" in this case.

thanks,
rui


      reply	other threads:[~2008-11-17  1:40 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-11-13  5:17 Len Brown
2008-11-15 17:17 ` Pavel Machek
2008-11-17  1:40   ` Zhang Rui [this message]

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