Hi, Guys:
I'm thinking about carrying this patch in Fedora for the time being:
diff -urp -X dontdiff linux-2.6.12/drivers/usb/storage/transport.c
linux-2.6.12-lem/drivers/usb/storage/transport.c
--- linux-2.6.12/drivers/usb/storage/transport.c 2005-06-21
12:58:48.000000000 -0700
+++ linux-2.6.12-lem/drivers/usb/storage/transport.c 2005-07-06
14:00:30.000000000 -0700
@@ -948,8 +948,9 @@ int usb_stor_Bulk_max_lun(struct us_data
int usb_stor_Bulk_transport(struct scsi_cmnd *srb, struct us_data *us)
{
- struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf;
- struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap *) us->iobuf;
+ /* Offset into iobuf a little in order to defeat pre-set DMA */
+ struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) (us->iobuf + 4);
+ struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap *) (us->iobuf + 4);
unsigned int transfer_length = srb->request_bufflen;
unsigned int residue;
int result;
@@ -960,7 +961,7 @@ int usb_stor_Bulk_transport(struct scsi_
/* Take care of BULK32 devices; set extra byte to 0 */
if ( unlikely(us->flags & US_FL_BULK32)) {
cbwlen = 32;
- us->iobuf[31] = 0;
+ ((unsigned char *)bcb)[31] = 0;
}
/* set up the command wrapper */
I do not detect performance issues, although that says nothing.
There may be some.
Without it, the usbmon in 2.6.12 cannot capture SCSI commands.
This ought to be fixed in usbmon, but it takes some time.
Does anyone think that this is a very bad idea?
-- Pete
-------------------------------------------------------
SF.Net email is sponsored by: Discover Easy Linux Migration Strategies
from IBM. Find simple to follow Roadmaps, straightforward articles,
informative Webcasts and more! Get everything you need to get up to
speed, fast. http://ads.osdn.com/?ad_id=7477&alloc_id=16492&op=click
_______________________________________________
[email protected]
To unsubscribe, use the last form field at:
https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
