1 files changed, 13 insertions, 17 deletions

diff --git a/kernel/drivers/s390/crypto/zcrypt_api.c b/kernel/drivers/s390/crypto/zcrypt_api.c
index 08f1830cb..9f8fa42c0 100644
--- a/kernel/drivers/s390/crypto/zcrypt_api.c
+++ b/kernel/drivers/s390/crypto/zcrypt_api.c
@@ -54,6 +54,10 @@ MODULE_DESCRIPTION("Cryptographic Coprocessor interface, " \
 		   "Copyright IBM Corp. 2001, 2012");
 MODULE_LICENSE("GPL");
 
+static int zcrypt_hwrng_seed = 1;
+module_param_named(hwrng_seed, zcrypt_hwrng_seed, int, S_IRUSR|S_IRGRP);
+MODULE_PARM_DESC(hwrng_seed, "Turn on/off hwrng auto seed, default is 1 (on).");
+
 static DEFINE_SPINLOCK(zcrypt_device_lock);
 static LIST_HEAD(zcrypt_device_list);
 static int zcrypt_device_count = 0;
@@ -313,11 +317,9 @@ EXPORT_SYMBOL(zcrypt_device_unregister);
 
 void zcrypt_msgtype_register(struct zcrypt_ops *zops)
 {
-	if (zops->owner) {
-		spin_lock_bh(&zcrypt_ops_list_lock);
-		list_add_tail(&zops->list, &zcrypt_ops_list);
-		spin_unlock_bh(&zcrypt_ops_list_lock);
-	}
+	spin_lock_bh(&zcrypt_ops_list_lock);
+	list_add_tail(&zops->list, &zcrypt_ops_list);
+	spin_unlock_bh(&zcrypt_ops_list_lock);
 }
 EXPORT_SYMBOL(zcrypt_msgtype_register);
 
@@ -338,7 +340,7 @@ struct zcrypt_ops *__ops_lookup(unsigned char *name, int variant)
 	spin_lock_bh(&zcrypt_ops_list_lock);
 	list_for_each_entry(zops, &zcrypt_ops_list, list) {
 		if ((zops->variant == variant) &&
-		    (!strncmp(zops->owner->name, name, MODULE_NAME_LEN))) {
+		    (!strncmp(zops->name, name, sizeof(zops->name)))) {
 			found = 1;
 			break;
 		}
@@ -468,8 +470,7 @@ static long zcrypt_rsa_crt(struct ica_rsa_modexpo_crt *crt)
 	unsigned long long z1, z2, z3;
 	int rc, copied;
 
-	if (crt->outputdatalength < crt->inputdatalength ||
-	    (crt->inputdatalength & 1))
+	if (crt->outputdatalength < crt->inputdatalength)
 		return -EINVAL;
 	/*
 	 * As long as outputdatalength is big enough, we can set the
@@ -1202,16 +1203,8 @@ static void sprinthx(unsigned char *title, struct seq_file *m,
 static void sprinthx4(unsigned char *title, struct seq_file *m,
 		      unsigned int *array, unsigned int len)
 {
-	int r;
-
 	seq_printf(m, "\n%s\n", title);
-	for (r = 0; r < len; r++) {
-		if ((r % 8) == 0)
-			seq_printf(m, "    ");
-		seq_printf(m, "%08X ", array[r]);
-		if ((r % 8) == 7)
-			seq_putc(m, '\n');
-	}
+	seq_hex_dump(m, "    ", DUMP_PREFIX_NONE, 32, 4, array, len, false);
 	seq_putc(m, '\n');
 }
 
@@ -1373,6 +1366,7 @@ static int zcrypt_rng_data_read(struct hwrng *rng, u32 *data)
 static struct hwrng zcrypt_rng_dev = {
 	.name		= "zcrypt",
 	.data_read	= zcrypt_rng_data_read,
+	.quality	= 990,
 };
 
 static int zcrypt_rng_device_add(void)
@@ -1387,6 +1381,8 @@ static int zcrypt_rng_device_add(void)
 			goto out;
 		}
 		zcrypt_rng_buffer_index = 0;
+		if (!zcrypt_hwrng_seed)
+			zcrypt_rng_dev.quality = 0;
 		rc = hwrng_register(&zcrypt_rng_dev);
 		if (rc)
 			goto out_free;