On Fri, 2007-04-06 at 08:12 -0700, Andrew Burgess wrote: > Yes. The 3w-xxxx.c driver changed between 2.6.18 and 2.6.20 but > nothing jumps out to my untrained eyes. Here's the diff: > Also, I should mention that the working kernel is a fedora > rpm (2.6.18-1.2798.fc6) so I don't know what patches are in it. > The vmlinuz is dated Oct 6 2006. It's actually a long standing bug in the 3w-xxxx driver. Apparently it assumes request sense is always the use_sg == 0 case. This is what it does on a request sense: static int tw_scsiop_request_sense(TW_Device_Extension *tw_dev, int request_id) { dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_request_sense()\n"); /* For now we just zero the request buffer */ memset(tw_dev->srb[request_id]->request_buffer, 0, tw_dev->srb[request_id]->request_bufflen); tw_dev->state[request_id] = TW_S_COMPLETED; tw_state_request_finish(tw_dev, request_id); .... Note that it's clearing the request buffer, which is actually zeroing the scatterlist, hence the problem. James - 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