linux-kernel - Re: New CD/DVD reports 'Can Play Audio NO'

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 14 Oct 2008 11:03:01 +0200
From:	"Boris Petkov" <petkovbb@...glemail.com>
To:	"Tejun Heo" <tj@...nel.org>
Cc:	"Nick Warne" <nick@...sn.org>, linux-kernel@...r.kernel.org,
	"D Bray" <db1986@...ernetdog.org>,
	"IDE/ATA development list" <linux-ide@...r.kernel.org>,
	"Bartlomiej Zolnierkiewicz" <bzolnier@...il.com>
Subject: Re: New CD/DVD reports 'Can Play Audio NO'

[..]

>>> Thanks.  sr.c just doesn't check whether the drive reports audio play
>>> capability or not.  It just sets it while ide-cd actually checks for
>>> the capability.  The drive is not reporting it while it can so ide-cd
>>> needs blacklist entry for it.  Now that idecd has blacklist entry, all
>>> should be fine.  Eh... I'm not sure whether we need to update sr to
>>> follow what ide-cd is doing or not.
>>>
>>> Thanks.
>>
>> Actually, as I already pointed out, I'm not at all happy with blacklisting
>> stuff. What sounds more sane to me (and this is only me) would be what sr.c
>> does: assume that per se the drive can play audio and try to play it. But how
>> many drives are there that cannot play audio, aka, would it be a safe assumption
>> to say that their number is so diminishingly small that it would be better to
>> announce that a drive can play audio by default and fail graciously in the
>> _very_ seldom case it actually cannot ...
>>
>
> Hmm... I don't know.  I think the flag indicates whether the drive has
> DAC and analog audio output, right?

Currently, ide-cd checks the AudioPlay bit advertized in the CD-ROM Capabilities
and Mechanical Status Page.

> I have quite some SATA drives which
> don't have audio output at all.  I haven't check what they report on the
> mode sense page yet.  Eh... well, having the bit set when the drive
> doesn't support it doesn't hurt too much (yet).  Bartlomiej, what do you
> think?

-- 
Regards/Gruss,
Boris
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/