SCSI changes in 2.6.3 break dvd+rw-tools
Michael Guntsche
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Hi Andy and list,
It looks like the following changes in the linux SCSI subsystem break
dvd+rw-tools for SCSI controlled writers (I have an external firewire
writer,
talking SCSI).
dvdrecord on the other hand works without a problem.
------------------
scsi_lib.c
/*
* Set the queue's mask to require a mere 8-byte alignment for
* DMA buffers, rather than the default 512. This shouldn't
* inconvenience any user programs and should be okay for most
* host adapters. A host driver can alter this mask in its
* slave_alloc() or slave_configure() callback if necessary.
*/
blk_queue_dma_alignment(q, (8 - 1));
------------------
Commenting this line out makes the tools work again.
I don't think that this is the right fix though.
I looked at dvd+rw-mediainfo first.
I found out that the following line caused the SCSI system to fail.
dvd+rw-meadiainfo.cpp-175: if ((err=cmd.transport(READ,header,8)))
There the program froze and the syslog started to spill out the
following error.
Feb 20 14:02:15 roadrunner kernel: SCSI error : <0 0 0 0> return code =
0x8000002
Feb 20 14:02:15 roadrunner kernel: Current sr0: sense = 70 4
Feb 20 14:02:15 roadrunner kernel: ASC=1b ASCQ= 0
Feb 20 14:02:15 roadrunner kernel: Raw sense data:0x70 0x00 0x04 0x00
0x00 0x00 0x00 0x0a 0x00 0x00 0x00 0x00 0x1b 0x00 0x00 0x00 0x00 0x00
Out of couriosity I changed the 8 to a 9 and it worked, but the program froze again
a little bit later, during another cmd.transport.
Does someone know how to fix this?
/Michael
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Michael Guntsche
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Some more information
> It looks like the following changes in the linux SCSI subsystem break
> dvd+rw-tools for SCSI controlled writers (I have an external firewire
> writer,
> talking SCSI).
> dvdrecord on the other hand works without a problem.
<snip>
The external writer works if I switch it to USB.
I haven't taken a look through the source to see if the programs are
doing something special for buflen in that case yet.
Cheers,
Michael
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Joachim Feise
growisofs hanging when running kernel 2.6.3.
I just tried commenting out that particular line, and I can
use growisofs just fine.
-Joe