From: Douglas Gilbert <dgilbert@interlog.com>
To: linux-kernel <linux-kernel@vger.kernel.org>
Cc: appro@fy.chalmers.se
Subject: Re: readcd with 2.5 kernels and ide-cd
Date: Fri, 30 May 2003 10:11:07 +1000 [thread overview]
Message-ID: <3ED6A19B.4000809@interlog.com> (raw)
Andy Polyakov wrote:
> Nothing fishy, nothing at all... It's as simple as
> driver/block/scsi_ioctl.c doesn't accepts requestes
> larger than 64KB, while readcd asks for 256KB.
Yes, that 64KB should be increased. The sg driver
allows up to 255 * 32 KB (just less than 8MB). From
memory cdparanoia uses a 128 KB packet size.
cdrecord uses 63 KB so it gets through.
> > 0x2285 is the SG_IO ioctl.
> sg_io returns EINVAL (line 163), but driver/block/ioctl.c
> transforms it to ENOTTY (see last 8 lines).
That is unhelpful. Is there a good reason for that?
I plan to get working on the SG_IO ioctl in the block
layer shortly. Andy has a patch to address the units
of the command timeout. sg's iovec may map simply as
well (maybe it won't either).
Doug Gilbert
next reply other threads:[~2003-05-29 23:59 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-30 0:11 Douglas Gilbert [this message]
[not found] <fa.hr5v5at.1e5iqab@ifi.uio.no>
[not found] ` <fa.cqhesj4.p2oeoc@ifi.uio.no>
2003-05-29 21:43 ` readcd with 2.5 kernels and ide-cd Andy Polyakov
2003-05-30 6:48 ` Jens Axboe
-- strict thread matches above, loose matches on Subject: below --
2003-05-29 16:44 Markus Plail
2003-05-29 17:30 ` Jens Axboe
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