leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

[PATCH] ohci1394, sbp2: fix "scsi_add_device failed" with PL-3507 based devices

Browse Source 
Re-enable posted writes for status FIFO.

Besides bringing back a very minor bandwidth tweak from Linux 2.6.15.x
and older, this also fixes an interoperability regression since 2.6.16:

   http://bugzilla.kernel.org/show_bug.cgi?id=6356
   (sbp2: scsi_add_device failed. IEEE1394 HD is not working anymore.)

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Tested-by: Vanei Heidemann <linux@javanei.com.br>
Tested-by: Martin Putzlocher <mputzi@gmx.de> (chip type unconfirmed)
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Stefan Richter 2006-05-15 22:09:46 +02:00 committed by Linus Torvalds
parent 679c0cd2dd
commit a54c9d30db
2 changed files with 8 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/ieee1394/ohci1394.c
View File

@ -553,7 +553,7 @@ static void ohci_initialize(struct ti_ohci *ohci)
* register content.
* To actually enable physical responses is the job of our interrupt
* handler which programs the physical request filter. */
reg_write(ohci, OHCI1394_PhyUpperBound, 0xffff0000);
reg_write(ohci, OHCI1394_PhyUpperBound, 0x01000000);
DBGMSG("physUpperBoundOffset=%08x",
reg_read(ohci, OHCI1394_PhyUpperBound));

9
drivers/ieee1394/sbp2.c
View File

@ -835,11 +835,16 @@ static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud
/* Register the status FIFO address range. We could use the same FIFO
* for targets at different nodes. However we need different FIFOs per
* target in order to support multi-unit devices. */
* target in order to support multi-unit devices.
* The FIFO is located out of the local host controller's physical range
* but, if possible, within the posted write area. Status writes will
* then be performed as unified transactions. This slightly reduces
* bandwidth usage, and some Prolific based devices seem to require it.
*/
scsi_id->status_fifo_addr = hpsb_allocate_and_register_addrspace(
&sbp2_highlevel, ud->ne->host, &sbp2_ops,
sizeof(struct sbp2_status_block), sizeof(quadlet_t),
~0ULL, ~0ULL);
0x010000000000ULL, CSR1212_ALL_SPACE_END);
if (!scsi_id->status_fifo_addr) {
SBP2_ERR("failed to allocate status FIFO address range");
goto failed_alloc;