On Tue, May 08 2007, Alan Cox wrote: > The CD-ROM layer doesn't bounce requests for old ISA controllers (and > nor should it). However they get injected into the SCSI layer via > sr_ioctl which also doesn't bounce them and SCSI then passes the buffer > along to a device with unchecked_isa_dma set which either panics or > truncates the buffer to 24bits. > > According to Jens the right long term fix is for the CD layer to route > the requests differently but in the mean time this has been tested by a > victim and verified to sort the problem out. For the other 99.9% of users > it's a no-op and doesn't bounce data. > > Signed-off-by: Alan Cox <alan@xxxxxxxxxx> Signed-off-by: Jens Axboe <jens.axboe@xxxxxxxxxx> Christoph passed me his patch to get rid of ->generic_packet() in the cdrom layer, so the work is almost complete. This patch is fine as a work-around until that gets merged, though. -- Jens Axboe - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
