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| author | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2006-05-15 22:09:46 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-05-17 21:32:22 -0700 |
| commit | a54c9d30dbb06391ec4422aaf0e1dc2c8c53bd3e (patch) | |
| tree | a87b764e94d4ca3f787b076e3f731a67ff68ee71 /drivers/ieee1394/sbp2.c | |
| parent | 679c0cd2dd61c825ab910fdbf347a8b7d1dddec4 (diff) | |
| download | op-kernel-dev-a54c9d30dbb06391ec4422aaf0e1dc2c8c53bd3e.zip op-kernel-dev-a54c9d30dbb06391ec4422aaf0e1dc2c8c53bd3e.tar.gz | |
[PATCH] ohci1394, sbp2: fix "scsi_add_device failed" with PL-3507 based devices
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>
Diffstat (limited to 'drivers/ieee1394/sbp2.c')
| -rw-r--r-- | drivers/ieee1394/sbp2.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c index 7355580..8a23fb5 100644 --- a/drivers/ieee1394/sbp2.c +++ b/drivers/ieee1394/sbp2.c @@ -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; |
