linux-kernel - Re: [regression] CD-DA delay needed after insertion (http://bugzilla.kernel.org/show

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Message-ID: <806dafc20809300807h6d38bbeex2f2b4e496b0d155c@mail.gmail.com>
Date:	Tue, 30 Sep 2008 11:07:34 -0400
From:	"Monty Montgomery" <monty@...h.org>
To:	"Geert Uytterhoeven" <Geert.Uytterhoeven@...ycom.com>
Cc:	"James Bottomley" <James.Bottomley@...senpartnership.com>,
	linux-scsi@...r.kernel.org,
	"Linux Kernel Development" <linux-kernel@...r.kernel.org>
Subject: Re: [regression] CD-DA delay needed after insertion (http://bugzilla.kernel.org/show_bug.cgi?id=10974)

> With latest cdparanoia git-^H^H^H^Hsvn, the problem still happens.
> After applying the patch below, there's no more crash thanks to your last
> commit, and It Just Works(tm):

Then I will be doing some headscratching over a copy of the kernel.
Oh--  what *exact* kernel are you using?  non-x86 trees don't always
sync often with the 'official' mainline and I want to be sure I'm
reading the correct thing.  I was a longtime PPC user until about two
years ago, and I'm used to there being several substantially different
PPC kernel trees [just making sure].

OTOH, if the kernel isn't even servicing the device as a block device
until the drive returns a ready status and O_NONBLOCK thwarts waiting
for that.... sigh.  Nothing like a passthrough interface that still
isn't a passthrough interface after fifteen years of dicking around.

I'm not willing to cripple cdparanoia on more-than-one-cdrom systems
because of an edge case due to yet another ill-considered block layer
'feature'.  For one thing *I* need to be able to scan devices without
blocking on my own multiple drive systems.  If there's a workaround to
get both, I will find it.

But it's too early to say for sure.  I'll check again.

(May I ask-- why the hard starting/stopping of the interface?  Power saving?]

Monty
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