[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>
diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c
index abf33db..e331df2 100644
--- a/drivers/s390/scsi/zfcp_aux.c
+++ b/drivers/s390/scsi/zfcp_aux.c
@@ -425,7 +425,8 @@
{
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 0b2ae60..9fa1b06 100644
--- a/drivers/s390/scsi/zfcp_def.h
+++ b/drivers/s390/scsi/zfcp_def.h
@@ -164,6 +164,7 @@
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 0be5e7e..e3dbeda 100644
--- a/drivers/s390/scsi/zfcp_erp.c
+++ b/drivers/s390/scsi/zfcp_erp.c
@@ -714,7 +714,7 @@
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 3822f22..9f90b03 100644
--- a/drivers/s390/scsi/zfcp_fsf.c
+++ b/drivers/s390/scsi/zfcp_fsf.c
@@ -496,6 +496,7 @@
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 4008bd7..519083f 100644
--- a/drivers/s390/scsi/zfcp_fsf.h
+++ b/drivers/s390/scsi/zfcp_fsf.h
@@ -366,7 +366,7 @@
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];