[SCSI] zfcp: Update status read mempool

Commit 64deb6efdc5504ce97b5c1c6f281fffbc150bd93 changed the way status
read buffers are handled but forgot to adjust the mempool to the new
size. Add the call to resize the mempool after the exchange config
data. Also use the define instead of the hard coded number in the fsf
callback for consistency.

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>

2 files changed, 10 insertions, 1 deletions

diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c
index e3dbeda97179..fd068bc1bd0a 100644
--- a/drivers/s390/scsi/zfcp_erp.c
+++ b/drivers/s390/scsi/zfcp_erp.c
@@ -714,6 +714,14 @@ 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;
 
+        if (mempool_resize(act->adapter->pool.status_read_data,
+                           act->adapter->stat_read_buf_num, GFP_KERNEL))
+                return ZFCP_ERP_FAILED;
+
+        if (mempool_resize(act->adapter->pool.status_read_req,
+                           act->adapter->stat_read_buf_num, GFP_KERNEL))
+                return ZFCP_ERP_FAILED;
+
         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 229795f190e8..71663fb77310 100644
--- a/drivers/s390/scsi/zfcp_fsf.c
+++ b/drivers/s390/scsi/zfcp_fsf.c
@@ -496,7 +496,8 @@ 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);
+        adapter->stat_read_buf_num = max(bottom->status_read_buf_num,
+                                         (u16)FSF_STATUS_READS_RECOM);
 
         if (fc_host_permanent_port_name(shost) == -1)
                 fc_host_permanent_port_name(shost) = fc_host_port_name(shost);