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-rw-r--r--drivers/s390/crypto/ap_bus.c9
-rw-r--r--drivers/s390/crypto/ap_bus.h2
-rw-r--r--drivers/s390/crypto/ap_queue.c26
-rw-r--r--drivers/s390/crypto/zcrypt_api.c30
4 files changed, 49 insertions, 18 deletions
diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index e15816ff1265..033a1acabf48 100644
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -810,11 +810,18 @@ static int ap_device_remove(struct device *dev)
struct ap_device *ap_dev = to_ap_dev(dev);
struct ap_driver *ap_drv = ap_dev->drv;
+ /* prepare ap queue device removal */
if (is_queue_dev(dev))
- ap_queue_remove(to_ap_queue(dev));
+ ap_queue_prepare_remove(to_ap_queue(dev));
+
+ /* driver's chance to clean up gracefully */
if (ap_drv->remove)
ap_drv->remove(ap_dev);
+ /* now do the ap queue device remove */
+ if (is_queue_dev(dev))
+ ap_queue_remove(to_ap_queue(dev));
+
/* Remove queue/card from list of active queues/cards */
spin_lock_bh(&ap_list_lock);
if (is_card_dev(dev))
diff --git a/drivers/s390/crypto/ap_bus.h b/drivers/s390/crypto/ap_bus.h
index d0059eae5d94..15a98a673c5c 100644
--- a/drivers/s390/crypto/ap_bus.h
+++ b/drivers/s390/crypto/ap_bus.h
@@ -91,6 +91,7 @@ enum ap_state {
AP_STATE_WORKING,
AP_STATE_QUEUE_FULL,
AP_STATE_SUSPEND_WAIT,
+ AP_STATE_REMOVE, /* about to be removed from driver */
AP_STATE_UNBOUND, /* momentary not bound to a driver */
AP_STATE_BORKED, /* broken */
NR_AP_STATES
@@ -252,6 +253,7 @@ void ap_bus_force_rescan(void);
void ap_queue_init_reply(struct ap_queue *aq, struct ap_message *ap_msg);
struct ap_queue *ap_queue_create(ap_qid_t qid, int device_type);
+void ap_queue_prepare_remove(struct ap_queue *aq);
void ap_queue_remove(struct ap_queue *aq);
void ap_queue_suspend(struct ap_device *ap_dev);
void ap_queue_resume(struct ap_device *ap_dev);
diff --git a/drivers/s390/crypto/ap_queue.c b/drivers/s390/crypto/ap_queue.c
index ba261210c6da..6a340f2c3556 100644
--- a/drivers/s390/crypto/ap_queue.c
+++ b/drivers/s390/crypto/ap_queue.c
@@ -420,6 +420,10 @@ static ap_func_t *ap_jumptable[NR_AP_STATES][NR_AP_EVENTS] = {
[AP_EVENT_POLL] = ap_sm_suspend_read,
[AP_EVENT_TIMEOUT] = ap_sm_nop,
},
+ [AP_STATE_REMOVE] = {
+ [AP_EVENT_POLL] = ap_sm_nop,
+ [AP_EVENT_TIMEOUT] = ap_sm_nop,
+ },
[AP_STATE_UNBOUND] = {
[AP_EVENT_POLL] = ap_sm_nop,
[AP_EVENT_TIMEOUT] = ap_sm_nop,
@@ -740,18 +744,31 @@ void ap_flush_queue(struct ap_queue *aq)
}
EXPORT_SYMBOL(ap_flush_queue);
-void ap_queue_remove(struct ap_queue *aq)
+void ap_queue_prepare_remove(struct ap_queue *aq)
{
- ap_flush_queue(aq);
+ spin_lock_bh(&aq->lock);
+ /* flush queue */
+ __ap_flush_queue(aq);
+ /* set REMOVE state to prevent new messages are queued in */
+ aq->state = AP_STATE_REMOVE;
del_timer_sync(&aq->timeout);
+ spin_unlock_bh(&aq->lock);
+}
- /* reset with zero, also clears irq registration */
+void ap_queue_remove(struct ap_queue *aq)
+{
+ /*
+ * all messages have been flushed and the state is
+ * AP_STATE_REMOVE. Now reset with zero which also
+ * clears the irq registration and move the state
+ * to AP_STATE_UNBOUND to signal that this queue
+ * is not used by any driver currently.
+ */
spin_lock_bh(&aq->lock);
ap_zapq(aq->qid);
aq->state = AP_STATE_UNBOUND;
spin_unlock_bh(&aq->lock);
}
-EXPORT_SYMBOL(ap_queue_remove);
void ap_queue_reinit_state(struct ap_queue *aq)
{
@@ -760,4 +777,3 @@ void ap_queue_reinit_state(struct ap_queue *aq)
ap_wait(ap_sm_event(aq, AP_EVENT_POLL));
spin_unlock_bh(&aq->lock);
}
-EXPORT_SYMBOL(ap_queue_reinit_state);
diff --git a/drivers/s390/crypto/zcrypt_api.c b/drivers/s390/crypto/zcrypt_api.c
index eb93c2d27d0a..689c2af7026a 100644
--- a/drivers/s390/crypto/zcrypt_api.c
+++ b/drivers/s390/crypto/zcrypt_api.c
@@ -586,6 +586,7 @@ static inline bool zcrypt_check_queue(struct ap_perms *perms, int queue)
static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
struct zcrypt_queue *zq,
+ struct module **pmod,
unsigned int weight)
{
if (!zq || !try_module_get(zq->queue->ap_dev.drv->driver.owner))
@@ -595,15 +596,15 @@ static inline struct zcrypt_queue *zcrypt_pick_queue(struct zcrypt_card *zc,
atomic_add(weight, &zc->load);
atomic_add(weight, &zq->load);
zq->request_count++;
+ *pmod = zq->queue->ap_dev.drv->driver.owner;
return zq;
}
static inline void zcrypt_drop_queue(struct zcrypt_card *zc,
struct zcrypt_queue *zq,
+ struct module *mod,
unsigned int weight)
{
- struct module *mod = zq->queue->ap_dev.drv->driver.owner;
-
zq->request_count--;
atomic_sub(weight, &zc->load);
atomic_sub(weight, &zq->load);
@@ -653,6 +654,7 @@ static long zcrypt_rsa_modexpo(struct ap_perms *perms,
unsigned int weight, pref_weight;
unsigned int func_code;
int qid = 0, rc = -ENODEV;
+ struct module *mod;
trace_s390_zcrypt_req(mex, TP_ICARSAMODEXPO);
@@ -706,7 +708,7 @@ static long zcrypt_rsa_modexpo(struct ap_perms *perms,
pref_weight = weight;
}
}
- pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
+ pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
spin_unlock(&zcrypt_list_lock);
if (!pref_zq) {
@@ -718,7 +720,7 @@ static long zcrypt_rsa_modexpo(struct ap_perms *perms,
rc = pref_zq->ops->rsa_modexpo(pref_zq, mex);
spin_lock(&zcrypt_list_lock);
- zcrypt_drop_queue(pref_zc, pref_zq, weight);
+ zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
spin_unlock(&zcrypt_list_lock);
out:
@@ -735,6 +737,7 @@ static long zcrypt_rsa_crt(struct ap_perms *perms,
unsigned int weight, pref_weight;
unsigned int func_code;
int qid = 0, rc = -ENODEV;
+ struct module *mod;
trace_s390_zcrypt_req(crt, TP_ICARSACRT);
@@ -788,7 +791,7 @@ static long zcrypt_rsa_crt(struct ap_perms *perms,
pref_weight = weight;
}
}
- pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
+ pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
spin_unlock(&zcrypt_list_lock);
if (!pref_zq) {
@@ -800,7 +803,7 @@ static long zcrypt_rsa_crt(struct ap_perms *perms,
rc = pref_zq->ops->rsa_modexpo_crt(pref_zq, crt);
spin_lock(&zcrypt_list_lock);
- zcrypt_drop_queue(pref_zc, pref_zq, weight);
+ zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
spin_unlock(&zcrypt_list_lock);
out:
@@ -819,6 +822,7 @@ static long _zcrypt_send_cprb(struct ap_perms *perms,
unsigned int func_code;
unsigned short *domain;
int qid = 0, rc = -ENODEV;
+ struct module *mod;
trace_s390_zcrypt_req(xcRB, TB_ZSECSENDCPRB);
@@ -865,7 +869,7 @@ static long _zcrypt_send_cprb(struct ap_perms *perms,
pref_weight = weight;
}
}
- pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
+ pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
spin_unlock(&zcrypt_list_lock);
if (!pref_zq) {
@@ -881,7 +885,7 @@ static long _zcrypt_send_cprb(struct ap_perms *perms,
rc = pref_zq->ops->send_cprb(pref_zq, xcRB, &ap_msg);
spin_lock(&zcrypt_list_lock);
- zcrypt_drop_queue(pref_zc, pref_zq, weight);
+ zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
spin_unlock(&zcrypt_list_lock);
out:
@@ -932,6 +936,7 @@ static long zcrypt_send_ep11_cprb(struct ap_perms *perms,
unsigned int func_code;
struct ap_message ap_msg;
int qid = 0, rc = -ENODEV;
+ struct module *mod;
trace_s390_zcrypt_req(xcrb, TP_ZSENDEP11CPRB);
@@ -1000,7 +1005,7 @@ static long zcrypt_send_ep11_cprb(struct ap_perms *perms,
pref_weight = weight;
}
}
- pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
+ pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
spin_unlock(&zcrypt_list_lock);
if (!pref_zq) {
@@ -1012,7 +1017,7 @@ static long zcrypt_send_ep11_cprb(struct ap_perms *perms,
rc = pref_zq->ops->send_ep11_cprb(pref_zq, xcrb, &ap_msg);
spin_lock(&zcrypt_list_lock);
- zcrypt_drop_queue(pref_zc, pref_zq, weight);
+ zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
spin_unlock(&zcrypt_list_lock);
out_free:
@@ -1033,6 +1038,7 @@ static long zcrypt_rng(char *buffer)
struct ap_message ap_msg;
unsigned int domain;
int qid = 0, rc = -ENODEV;
+ struct module *mod;
trace_s390_zcrypt_req(buffer, TP_HWRNGCPRB);
@@ -1064,7 +1070,7 @@ static long zcrypt_rng(char *buffer)
pref_weight = weight;
}
}
- pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, weight);
+ pref_zq = zcrypt_pick_queue(pref_zc, pref_zq, &mod, weight);
spin_unlock(&zcrypt_list_lock);
if (!pref_zq) {
@@ -1076,7 +1082,7 @@ static long zcrypt_rng(char *buffer)
rc = pref_zq->ops->rng(pref_zq, buffer, &ap_msg);
spin_lock(&zcrypt_list_lock);
- zcrypt_drop_queue(pref_zc, pref_zq, weight);
+ zcrypt_drop_queue(pref_zc, pref_zq, mod, weight);
spin_unlock(&zcrypt_list_lock);
out:

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