[S390] zcrypt: Do not start ap poll thread per default

Do not start ap poll thread per default to increase perfomance with
z/VM.
Signed-off-by: NFelix Beck <felix.beck@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/crypto/ap_bus.c

@@ -61,9 +61,9 @@ module_param_named(domain, ap_domain_index, int, 0000);
 MODULE_PARM_DESC(domain, "domain index for ap devices");
 EXPORT_SYMBOL(ap_domain_index);
 
-static int ap_thread_flag = 1;
+static int ap_thread_flag = 0;
 module_param_named(poll_thread, ap_thread_flag, int, 0000);
-MODULE_PARM_DESC(poll_thread, "Turn on/off poll thread, default is 1 (on).");
+MODULE_PARM_DESC(poll_thread, "Turn on/off poll thread, default is 0 (off).");
 
 static struct device *ap_root_device = NULL;
 static DEFINE_SPINLOCK(ap_device_lock);