Re: [Bugme-new] [Bug 7667] New: BUG at drivers/scsi/scsi_lib.c:1118 caused by "pktsetup dvd /dev/sr0"

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This is because the packet driver tries to send down read/write
BLOCK_PC commands that don't use a bio and do not use sg lists.
As part of the patch you mentioned I added strict assertations for that
case because the scsi layer doesn't handle those anymore.

The right fix is to replace all the packet_command stuff in the packet
driver by scsi_execute() which needs to be lifted from scsi code to
the block code for that.  I'll prepare a patch this weekend unless
someone beets me in doing that work.
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