diff options
| author | Christof Schmitt <christof.schmitt@de.ibm.com> | 2010-04-30 18:09:36 +0200 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2010-05-02 15:42:33 -0400 |
| commit | 64deb6efdc5504ce97b5c1c6f281fffbc150bd93 (patch) | |
| tree | dac0645d128d00b19ca55fe11f6d51b6e9f19d8e /drivers | |
| parent | 6b9e1520094a8aa68009c265eb694e0be9f5be3f (diff) | |
| download | linux-64deb6efdc5504ce97b5c1c6f281fffbc150bd93.tar.bz2 | |
[SCSI] zfcp: Use status_read_buf_num provided by FCP channel
The FCP channel provides the number of status read buffers to issue.
Use the provided number instead of the hardcoded number in zfcp.
Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/s390/scsi/zfcp_aux.c | 3 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_def.h | 1 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_erp.c | 2 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_fsf.c | 1 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_fsf.h | 2 |
5 files changed, 6 insertions, 3 deletions
diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c index abf33db647ff..e331df2122f7 100644 --- a/drivers/s390/scsi/zfcp_aux.c +++ b/drivers/s390/scsi/zfcp_aux.c @@ -425,7 +425,8 @@ int zfcp_status_read_refill(struct zfcp_adapter *adapter) { while (atomic_read(&adapter->stat_miss) > 0) if (zfcp_fsf_status_read(adapter->qdio)) { - if (atomic_read(&adapter->stat_miss) >= 16) { + if (atomic_read(&adapter->stat_miss) >= + adapter->stat_read_buf_num) { zfcp_erp_adapter_reopen(adapter, 0, "axsref1", NULL); return 1; diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h index 0b2ae60a6f9f..9fa1b064893e 100644 --- a/drivers/s390/scsi/zfcp_def.h +++ b/drivers/s390/scsi/zfcp_def.h @@ -164,6 +164,7 @@ struct zfcp_adapter { stack abort/command completion races */ atomic_t stat_miss; /* # missing status reads*/ + unsigned int stat_read_buf_num; struct work_struct stat_work; atomic_t status; /* status of this adapter */ struct list_head erp_ready_head; /* error recovery for this diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c index 0be5e7ea2828..e3dbeda97179 100644 --- a/drivers/s390/scsi/zfcp_erp.c +++ b/drivers/s390/scsi/zfcp_erp.c @@ -714,7 +714,7 @@ static int zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *act) if (zfcp_erp_adapter_strategy_open_fsf_xport(act) == ZFCP_ERP_FAILED) return ZFCP_ERP_FAILED; - atomic_set(&act->adapter->stat_miss, 16); + atomic_set(&act->adapter->stat_miss, act->adapter->stat_read_buf_num); if (zfcp_status_read_refill(act->adapter)) return ZFCP_ERP_FAILED; diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c index 3822f22b8150..9f90b03ac97d 100644 --- a/drivers/s390/scsi/zfcp_fsf.c +++ b/drivers/s390/scsi/zfcp_fsf.c @@ -496,6 +496,7 @@ static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req) adapter->hydra_version = bottom->adapter_type; adapter->timer_ticks = bottom->timer_interval; + adapter->stat_read_buf_num = max(bottom->status_read_buf_num, (u16)16); if (fc_host_permanent_port_name(shost) == -1) fc_host_permanent_port_name(shost) = fc_host_port_name(shost); diff --git a/drivers/s390/scsi/zfcp_fsf.h b/drivers/s390/scsi/zfcp_fsf.h index 4008bd786793..519083fd6e89 100644 --- a/drivers/s390/scsi/zfcp_fsf.h +++ b/drivers/s390/scsi/zfcp_fsf.h @@ -366,7 +366,7 @@ struct fsf_qtcb_bottom_config { u32 adapter_type; u8 res0; u8 peer_d_id[3]; - u8 res1[2]; + u16 status_read_buf_num; u16 timer_interval; u8 res2[9]; u8 s_id[3]; |