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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2016-09-02 15:21:45 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2016-12-14 16:33:37 +0100
commit236fb2ab95e9832880501d465d64eb2f2935b852 (patch)
tree7a3f44d63cc8faa4be38d23b39c506fb961aae5f /drivers/s390
parents390/zcrypt: Move the ap bus into kernel (diff)
downloadlinux-dev-236fb2ab95e9832880501d465d64eb2f2935b852.tar.xz
linux-dev-236fb2ab95e9832880501d465d64eb2f2935b852.zip
s390/zcrypt: simplify message type handling
Now that the message type modules are linked with the zcrypt_api into a single module the zcrypt_ops_list is initialized by the module init function of the zcyppt.ko module. After that the list is static and all message types are present. Drop the zcrypt_ops_list_lock spinlock and the module handling in regard to the message types. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/crypto/zcrypt_api.c49
-rw-r--r--drivers/s390/crypto/zcrypt_api.h3
-rw-r--r--drivers/s390/crypto/zcrypt_cex2a.c6
-rw-r--r--drivers/s390/crypto/zcrypt_cex4.c16
-rw-r--r--drivers/s390/crypto/zcrypt_pcixcc.c11
5 files changed, 18 insertions, 67 deletions
diff --git a/drivers/s390/crypto/zcrypt_api.c b/drivers/s390/crypto/zcrypt_api.c
index 7f61ae1b0b93..dc6d891a7b48 100644
--- a/drivers/s390/crypto/zcrypt_api.c
+++ b/drivers/s390/crypto/zcrypt_api.c
@@ -71,7 +71,6 @@ EXPORT_SYMBOL(zcrypt_rescan_req);
static int zcrypt_rng_device_add(void);
static void zcrypt_rng_device_remove(void);
-static DEFINE_SPINLOCK(zcrypt_ops_list_lock);
static LIST_HEAD(zcrypt_ops_list);
static debug_info_t *zcrypt_dbf_common;
@@ -318,61 +317,25 @@ EXPORT_SYMBOL(zcrypt_device_unregister);
void zcrypt_msgtype_register(struct zcrypt_ops *zops)
{
- 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);
void zcrypt_msgtype_unregister(struct zcrypt_ops *zops)
{
- spin_lock_bh(&zcrypt_ops_list_lock);
list_del_init(&zops->list);
- spin_unlock_bh(&zcrypt_ops_list_lock);
}
-EXPORT_SYMBOL(zcrypt_msgtype_unregister);
-static inline
-struct zcrypt_ops *__ops_lookup(unsigned char *name, int variant)
+struct zcrypt_ops *zcrypt_msgtype(unsigned char *name, int variant)
{
struct zcrypt_ops *zops;
- int found = 0;
- spin_lock_bh(&zcrypt_ops_list_lock);
- list_for_each_entry(zops, &zcrypt_ops_list, list) {
+ list_for_each_entry(zops, &zcrypt_ops_list, list)
if ((zops->variant == variant) &&
- (!strncmp(zops->name, name, sizeof(zops->name)))) {
- found = 1;
- break;
- }
- }
- if (!found || !try_module_get(zops->owner))
- zops = NULL;
-
- spin_unlock_bh(&zcrypt_ops_list_lock);
-
- return zops;
-}
-
-struct zcrypt_ops *zcrypt_msgtype_request(unsigned char *name, int variant)
-{
- struct zcrypt_ops *zops = NULL;
-
- zops = __ops_lookup(name, variant);
- if (!zops) {
- request_module("%s", name);
- zops = __ops_lookup(name, variant);
- }
- return zops;
-}
-EXPORT_SYMBOL(zcrypt_msgtype_request);
-
-void zcrypt_msgtype_release(struct zcrypt_ops *zops)
-{
- if (zops)
- module_put(zops->owner);
+ (!strncmp(zops->name, name, sizeof(zops->name))))
+ return zops;
+ return NULL;
}
-EXPORT_SYMBOL(zcrypt_msgtype_release);
+EXPORT_SYMBOL(zcrypt_msgtype);
/**
* zcrypt_read (): Not supported beyond zcrypt 1.3.1.
diff --git a/drivers/s390/crypto/zcrypt_api.h b/drivers/s390/crypto/zcrypt_api.h
index 38618f05ad92..326ecdc0417f 100644
--- a/drivers/s390/crypto/zcrypt_api.h
+++ b/drivers/s390/crypto/zcrypt_api.h
@@ -133,8 +133,7 @@ int zcrypt_device_register(struct zcrypt_device *);
void zcrypt_device_unregister(struct zcrypt_device *);
void zcrypt_msgtype_register(struct zcrypt_ops *);
void zcrypt_msgtype_unregister(struct zcrypt_ops *);
-struct zcrypt_ops *zcrypt_msgtype_request(unsigned char *, int);
-void zcrypt_msgtype_release(struct zcrypt_ops *);
+struct zcrypt_ops *zcrypt_msgtype(unsigned char *, int);
int zcrypt_api_init(void);
void zcrypt_api_exit(void);
diff --git a/drivers/s390/crypto/zcrypt_cex2a.c b/drivers/s390/crypto/zcrypt_cex2a.c
index 15104aaa075a..d892cb539139 100644
--- a/drivers/s390/crypto/zcrypt_cex2a.c
+++ b/drivers/s390/crypto/zcrypt_cex2a.c
@@ -122,8 +122,7 @@ static int zcrypt_cex2a_probe(struct ap_device *ap_dev)
}
if (!zdev)
return -ENODEV;
- zdev->ops = zcrypt_msgtype_request(MSGTYPE50_NAME,
- MSGTYPE50_VARIANT_DEFAULT);
+ zdev->ops = zcrypt_msgtype(MSGTYPE50_NAME, MSGTYPE50_VARIANT_DEFAULT);
zdev->ap_dev = ap_dev;
zdev->online = 1;
ap_device_init_reply(ap_dev, &zdev->reply);
@@ -131,7 +130,6 @@ static int zcrypt_cex2a_probe(struct ap_device *ap_dev)
rc = zcrypt_device_register(zdev);
if (rc) {
ap_dev->private = NULL;
- zcrypt_msgtype_release(zdev->ops);
zcrypt_device_free(zdev);
}
return rc;
@@ -144,10 +142,8 @@ static int zcrypt_cex2a_probe(struct ap_device *ap_dev)
static void zcrypt_cex2a_remove(struct ap_device *ap_dev)
{
struct zcrypt_device *zdev = ap_dev->private;
- struct zcrypt_ops *zops = zdev->ops;
zcrypt_device_unregister(zdev);
- zcrypt_msgtype_release(zops);
}
int __init zcrypt_cex2a_init(void)
diff --git a/drivers/s390/crypto/zcrypt_cex4.c b/drivers/s390/crypto/zcrypt_cex4.c
index ccb2e78ebf0e..e98bdbe45d2c 100644
--- a/drivers/s390/crypto/zcrypt_cex4.c
+++ b/drivers/s390/crypto/zcrypt_cex4.c
@@ -102,8 +102,8 @@ static int zcrypt_cex4_probe(struct ap_device *ap_dev)
CEX4A_MAX_MOD_SIZE_2K;
}
zdev->short_crt = 1;
- zdev->ops = zcrypt_msgtype_request(MSGTYPE50_NAME,
- MSGTYPE50_VARIANT_DEFAULT);
+ zdev->ops = zcrypt_msgtype(MSGTYPE50_NAME,
+ MSGTYPE50_VARIANT_DEFAULT);
} else if (ap_test_bit(&ap_dev->functions, AP_FUNC_COPRO)) {
zdev = zcrypt_device_alloc(CEX4C_MAX_MESSAGE_SIZE);
if (!zdev)
@@ -120,8 +120,8 @@ static int zcrypt_cex4_probe(struct ap_device *ap_dev)
zdev->max_mod_size = CEX4C_MAX_MOD_SIZE;
zdev->max_exp_bit_length = CEX4C_MAX_MOD_SIZE;
zdev->short_crt = 0;
- zdev->ops = zcrypt_msgtype_request(MSGTYPE06_NAME,
- MSGTYPE06_VARIANT_DEFAULT);
+ zdev->ops = zcrypt_msgtype(MSGTYPE06_NAME,
+ MSGTYPE06_VARIANT_DEFAULT);
} else if (ap_test_bit(&ap_dev->functions, AP_FUNC_EP11)) {
zdev = zcrypt_device_alloc(CEX4C_MAX_MESSAGE_SIZE);
if (!zdev)
@@ -138,8 +138,8 @@ static int zcrypt_cex4_probe(struct ap_device *ap_dev)
zdev->max_mod_size = CEX4C_MAX_MOD_SIZE;
zdev->max_exp_bit_length = CEX4C_MAX_MOD_SIZE;
zdev->short_crt = 0;
- zdev->ops = zcrypt_msgtype_request(MSGTYPE06_NAME,
- MSGTYPE06_VARIANT_EP11);
+ zdev->ops = zcrypt_msgtype(MSGTYPE06_NAME,
+ MSGTYPE06_VARIANT_EP11);
}
break;
}
@@ -151,7 +151,6 @@ static int zcrypt_cex4_probe(struct ap_device *ap_dev)
ap_dev->private = zdev;
rc = zcrypt_device_register(zdev);
if (rc) {
- zcrypt_msgtype_release(zdev->ops);
ap_dev->private = NULL;
zcrypt_device_free(zdev);
}
@@ -165,12 +164,9 @@ static int zcrypt_cex4_probe(struct ap_device *ap_dev)
static void zcrypt_cex4_remove(struct ap_device *ap_dev)
{
struct zcrypt_device *zdev = ap_dev->private;
- struct zcrypt_ops *zops;
if (zdev) {
- zops = zdev->ops;
zcrypt_device_unregister(zdev);
- zcrypt_msgtype_release(zops);
}
}
diff --git a/drivers/s390/crypto/zcrypt_pcixcc.c b/drivers/s390/crypto/zcrypt_pcixcc.c
index df8f0c4dacb7..8491541f72cf 100644
--- a/drivers/s390/crypto/zcrypt_pcixcc.c
+++ b/drivers/s390/crypto/zcrypt_pcixcc.c
@@ -322,11 +322,11 @@ static int zcrypt_pcixcc_probe(struct ap_device *ap_dev)
return rc;
}
if (rc)
- zdev->ops = zcrypt_msgtype_request(MSGTYPE06_NAME,
- MSGTYPE06_VARIANT_DEFAULT);
+ zdev->ops = zcrypt_msgtype(MSGTYPE06_NAME,
+ MSGTYPE06_VARIANT_DEFAULT);
else
- zdev->ops = zcrypt_msgtype_request(MSGTYPE06_NAME,
- MSGTYPE06_VARIANT_NORNG);
+ zdev->ops = zcrypt_msgtype(MSGTYPE06_NAME,
+ MSGTYPE06_VARIANT_NORNG);
ap_device_init_reply(ap_dev, &zdev->reply);
ap_dev->private = zdev;
rc = zcrypt_device_register(zdev);
@@ -336,7 +336,6 @@ static int zcrypt_pcixcc_probe(struct ap_device *ap_dev)
out_free:
ap_dev->private = NULL;
- zcrypt_msgtype_release(zdev->ops);
zcrypt_device_free(zdev);
return rc;
}
@@ -348,10 +347,8 @@ static int zcrypt_pcixcc_probe(struct ap_device *ap_dev)
static void zcrypt_pcixcc_remove(struct ap_device *ap_dev)
{
struct zcrypt_device *zdev = ap_dev->private;
- struct zcrypt_ops *zops = zdev->ops;
zcrypt_device_unregister(zdev);
- zcrypt_msgtype_release(zops);
}
int __init zcrypt_pcixcc_init(void)