>>>>> On Thu, 8 Sep 2005 16:40:16 -0400 (EDT), Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> said: stern> I've long thought that usb-storage should allocate its own stern> transfer buffer for sense data. In the past people have said, stern> "No, don't bother, it's not really needed." Here's a good stern> reason for doing it. stern> Expect a patch before long. Did you already create the patch? If not, how about this (against 2.6.13) ? Signed-off-by: Atsushi Nemoto <anemo@xxxxxxxxxxxxx> diff -u linux-2.6.13/drivers/usb/storage/transport.c linux/drivers/usb/storage/transport.c --- linux-2.6.13/drivers/usb/storage/transport.c 2005-08-29 08:41:01.000000000 +0900 +++ linux/drivers/usb/storage/transport.c 2005-09-27 18:03:32.000000000 +0900 @@ -638,7 +638,8 @@ /* use the new buffer we have */ old_request_buffer = srb->request_buffer; - srb->request_buffer = srb->sense_buffer; + srb->request_buffer = + kmalloc(max(dma_get_cache_alignment(), 18), GFP_NOIO); /* set the buffer length for transfer */ old_request_bufflen = srb->request_bufflen; @@ -655,7 +656,13 @@ /* issue the auto-sense command */ old_resid = srb->resid; srb->resid = 0; - temp_result = us->transport(us->srb, us); + if (srb->request_buffer) { + temp_result = us->transport(us->srb, us); + memcpy(srb->sense_buffer, srb->request_buffer, 18); + kfree(srb->request_buffer); + } else { + temp_result = USB_STOR_TRANSPORT_FAILED; + } /* let's clean up right away */ srb->resid = old_resid; --- Atsushi Nemoto - : 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