The ipr family of adapters is capable of handling data transfer sizes of
16777215 bytes. Logical disk array devices under ipr are capable of only
256k transfer lengths. Patch sets max_sectors of the adapter to 32767 and
overrides max_sectors for the logical disk array devices in the
slave_configure routine.
Signed-off-by: Brian King <[EMAIL PROTECTED]>
---
linux-2.6.11-rc4-bk9-bjking1/drivers/scsi/ipr.c | 6 ++++--
linux-2.6.11-rc4-bk9-bjking1/drivers/scsi/ipr.h | 3 ++-
2 files changed, 6 insertions(+), 3 deletions(-)
diff -puN drivers/scsi/ipr.c~ipr_max_sectors drivers/scsi/ipr.c
--- linux-2.6.11-rc4-bk9/drivers/scsi/ipr.c~ipr_max_sectors 2005-02-21
13:11:55.000000000 -0600
+++ linux-2.6.11-rc4-bk9-bjking1/drivers/scsi/ipr.c 2005-02-21
13:11:55.000000000 -0600
@@ -2833,8 +2833,10 @@ static int ipr_slave_configure(struct sc
sdev->type = TYPE_RAID;
if (ipr_is_af_dasd_device(res) || ipr_is_ioa_resource(res))
sdev->scsi_level = 4;
- if (ipr_is_vset_device(res))
+ if (ipr_is_vset_device(res)) {
sdev->timeout = IPR_VSET_RW_TIMEOUT;
+ blk_queue_max_sectors(sdev->request_queue,
IPR_VSET_MAX_SECTORS);
+ }
if (IPR_IS_DASD_DEVICE(res->cfgte.std_inq_data))
sdev->allow_restart = 1;
scsi_adjust_queue_depth(sdev, 0, res->qdepth);
@@ -3952,7 +3954,7 @@ static struct scsi_host_template driver_
.can_queue = IPR_MAX_COMMANDS,
.this_id = -1,
.sg_tablesize = IPR_MAX_SGLIST,
- .max_sectors = IPR_MAX_SECTORS,
+ .max_sectors = IPR_IOA_MAX_SECTORS,
.cmd_per_lun = IPR_MAX_CMD_PER_LUN,
.use_clustering = ENABLE_CLUSTERING,
.shost_attrs = ipr_ioa_attrs,
diff -puN drivers/scsi/ipr.h~ipr_max_sectors drivers/scsi/ipr.h
--- linux-2.6.11-rc4-bk9/drivers/scsi/ipr.h~ipr_max_sectors 2005-02-21
13:11:55.000000000 -0600
+++ linux-2.6.11-rc4-bk9-bjking1/drivers/scsi/ipr.h 2005-02-21
13:11:55.000000000 -0600
@@ -130,7 +130,8 @@
#define IPR_MAX_PHYSICAL_DEVS 192
#define IPR_MAX_SGLIST 64
-#define IPR_MAX_SECTORS 512
+#define IPR_IOA_MAX_SECTORS 32767
+#define IPR_VSET_MAX_SECTORS 512
#define IPR_MAX_CDB_LEN 16
#define IPR_DEFAULT_BUS_WIDTH 16
_
-
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