IB/iser: Set IP_CSUM as default guard type

In the future this will be a per-command parameter so we can lose it,
but in the mean time IP_CSUM is a lot lighter for SW layers to
compute, set it as default.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

drivers/infiniband/ulp/iser/iscsi_iser.c

@@ -83,7 +83,7 @@ module_param_named(max_lun, iscsi_max_lun, uint, S_IRUGO);
 
 int iser_debug_level = 0;
 bool iser_pi_enable = false;
-int iser_pi_guard = 0;
+int iser_pi_guard = 1;
 
 MODULE_DESCRIPTION("iSER (iSCSI Extensions for RDMA) Datamover");
 MODULE_LICENSE("Dual BSD/GPL");
@@ -97,7 +97,7 @@ module_param_named(pi_enable, iser_pi_enable, bool, 0644);
 MODULE_PARM_DESC(pi_enable, "Enable T10-PI offload support (default:disabled)");
 
 module_param_named(pi_guard, iser_pi_guard, int, 0644);
-MODULE_PARM_DESC(pi_guard, "T10-PI guard_type, 0:CRC|1:IP_CSUM (default:CRC)");
+MODULE_PARM_DESC(pi_guard, "T10-PI guard_type, 0:CRC|1:IP_CSUM (default:IP_CSUM)");
 
 static struct workqueue_struct *release_wq;
 struct iser_global ig;