dev_dbg(&socket->dev, "pcmcia_register_socket(0x%p)\n", socket->ops);
- spin_lock_init(&socket->lock);
-
/* try to obtain a socket number [yes, it gets ugly if we
* register more than 2^sizeof(unsigned int) pcmcia
* sockets... but the socket number is deprecated
init_completion(&socket->socket_released);
init_completion(&socket->thread_done);
mutex_init(&socket->skt_mutex);
+ mutex_init(&socket->ops_mutex);
spin_lock_init(&socket->thread_lock);
if (socket->resource_ops->init) {
+ mutex_lock(&socket->ops_mutex);
ret = socket->resource_ops->init(socket);
+ mutex_unlock(&socket->ops_mutex);
if (ret)
goto err;
}
up_write(&pcmcia_socket_list_rwsem);
/* wait for sysfs to drop all references */
- release_resource_db(socket);
+ if (socket->resource_ops->exit) {
+ mutex_lock(&socket->ops_mutex);
+ socket->resource_ops->exit(socket);
+ mutex_unlock(&socket->ops_mutex);
+ }
wait_for_completion(&socket->socket_released);
} /* pcmcia_unregister_socket */
EXPORT_SYMBOL(pcmcia_unregister_socket);
dev_dbg(&s->dev, "shutdown\n");
send_event(s, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH);
+
+ mutex_lock(&s->ops_mutex);
s->state &= SOCKET_INUSE | SOCKET_PRESENT;
msleep(shutdown_delay * 10);
s->state &= SOCKET_INUSE;
s->lock_count = 0;
kfree(s->fake_cis);
s->fake_cis = NULL;
+ s->functions = 0;
+
+ /* From here on we can be sure that only we (that is, the
+ * pccardd thread) accesses this socket, and all (16-bit)
+ * PCMCIA interactions are gone. Therefore, release
+ * ops_mutex so that we don't get a sysfs-related lockdep
+ * warning.
+ */
+ mutex_unlock(&s->ops_mutex);
+
#ifdef CONFIG_CARDBUS
cb_free(s);
#endif
- s->functions = 0;
/* give socket some time to power down */
msleep(100);
dev_dbg(&skt->dev, "insert\n");
- WARN_ON(skt->state & SOCKET_INUSE);
+ mutex_lock(&skt->ops_mutex);
+ if (skt->state & SOCKET_INUSE) {
+ mutex_unlock(&skt->ops_mutex);
+ return -EINVAL;
+ }
skt->state |= SOCKET_INUSE;
ret = socket_setup(skt, setup_delay);
}
#endif
dev_dbg(&skt->dev, "insert done\n");
+ mutex_unlock(&skt->ops_mutex);
send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
} else {
+ mutex_unlock(&skt->ops_mutex);
socket_shutdown(skt);
}
if (skt->state & SOCKET_SUSPEND)
return -EBUSY;
+ mutex_lock(&skt->ops_mutex);
skt->suspended_state = skt->state;
send_event(skt, CS_EVENT_PM_SUSPEND, CS_EVENT_PRI_LOW);
if (skt->ops->suspend)
skt->ops->suspend(skt);
skt->state |= SOCKET_SUSPEND;
-
+ mutex_unlock(&skt->ops_mutex);
return 0;
}
static int socket_early_resume(struct pcmcia_socket *skt)
{
+ mutex_lock(&skt->ops_mutex);
skt->socket = dead_socket;
skt->ops->init(skt);
skt->ops->set_socket(skt, &skt->socket);
if (skt->state & SOCKET_PRESENT)
skt->resume_status = socket_setup(skt, resume_delay);
+ mutex_unlock(&skt->ops_mutex);
return 0;
}
static int socket_late_resume(struct pcmcia_socket *skt)
{
+ mutex_lock(&skt->ops_mutex);
skt->state &= ~SOCKET_SUSPEND;
+ mutex_unlock(&skt->ops_mutex);
if (!(skt->state & SOCKET_PRESENT))
return socket_insert(skt);
for (;;) {
unsigned long flags;
unsigned int events;
+ unsigned int sysfs_events;
set_current_state(TASK_INTERRUPTIBLE);
spin_lock_irqsave(&skt->thread_lock, flags);
events = skt->thread_events;
skt->thread_events = 0;
+ sysfs_events = skt->sysfs_events;
+ skt->sysfs_events = 0;
spin_unlock_irqrestore(&skt->thread_lock, flags);
+ mutex_lock(&skt->skt_mutex);
if (events) {
- mutex_lock(&skt->skt_mutex);
if (events & SS_DETECT)
socket_detect_change(skt);
if (events & SS_BATDEAD)
send_event(skt, CS_EVENT_BATTERY_LOW, CS_EVENT_PRI_LOW);
if (events & SS_READY)
send_event(skt, CS_EVENT_READY_CHANGE, CS_EVENT_PRI_LOW);
- mutex_unlock(&skt->skt_mutex);
- continue;
}
+ if (sysfs_events) {
+ if (sysfs_events & PCMCIA_UEVENT_EJECT)
+ socket_remove(skt);
+ if (sysfs_events & PCMCIA_UEVENT_INSERT)
+ socket_insert(skt);
+ if ((sysfs_events & PCMCIA_UEVENT_RESUME) &&
+ !(skt->state & SOCKET_CARDBUS)) {
+ ret = socket_resume(skt);
+ if (!ret && skt->callback)
+ skt->callback->resume(skt);
+ }
+ if ((sysfs_events & PCMCIA_UEVENT_SUSPEND) &&
+ !(skt->state & SOCKET_CARDBUS)) {
+ if (skt->callback)
+ ret = skt->callback->suspend(skt);
+ else
+ ret = 0;
+ if (!ret)
+ socket_suspend(skt);
+ }
+ if ((sysfs_events & PCMCIA_UEVENT_REQUERY) &&
+ !(skt->state & SOCKET_CARDBUS)) {
+ if (!ret && skt->callback)
+ skt->callback->requery(skt);
+ }
+ }
+ mutex_unlock(&skt->skt_mutex);
+
+ if (events || sysfs_events)
+ continue;
+
if (kthread_should_stop())
break;
} /* pcmcia_parse_events */
EXPORT_SYMBOL(pcmcia_parse_events);
+/**
+ * pcmcia_parse_uevents() - tell pccardd to issue manual commands
+ * @s: the PCMCIA socket we wan't to command
+ * @events: events to pass to pccardd
+ *
+ * userspace-issued insert, eject, suspend and resume commands must be
+ * handled by pccardd to avoid any sysfs-related deadlocks. Valid events
+ * are PCMCIA_UEVENT_EJECT (for eject), PCMCIA_UEVENT__INSERT (for insert),
+ * PCMCIA_UEVENT_RESUME (for resume), PCMCIA_UEVENT_SUSPEND (for suspend)
+ * and PCMCIA_UEVENT_REQUERY (for re-querying the PCMCIA card).
+ */
+void pcmcia_parse_uevents(struct pcmcia_socket *s, u_int events)
+{
+ unsigned long flags;
+ dev_dbg(&s->dev, "parse_uevents: events %08x\n", events);
+ if (s->thread) {
+ spin_lock_irqsave(&s->thread_lock, flags);
+ s->sysfs_events |= events;
+ spin_unlock_irqrestore(&s->thread_lock, flags);
+
+ wake_up_process(s->thread);
+ }
+}
+EXPORT_SYMBOL(pcmcia_parse_uevents);
+
/* register pcmcia_callback */
int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c)
send_event(skt, CS_EVENT_RESET_PHYSICAL, CS_EVENT_PRI_LOW);
if (skt->callback)
skt->callback->suspend(skt);
- if (socket_reset(skt) == 0) {
+ mutex_lock(&skt->ops_mutex);
+ ret = socket_reset(skt);
+ mutex_unlock(&skt->ops_mutex);
+ if (ret == 0) {
send_event(skt, CS_EVENT_CARD_RESET, CS_EVENT_PRI_LOW);
if (skt->callback)
skt->callback->resume(skt);
EXPORT_SYMBOL(pcmcia_reset_card);
-/* These shut down or wake up a socket. They are sort of user
- * initiated versions of the APM suspend and resume actions.
- */
-int pcmcia_suspend_card(struct pcmcia_socket *skt)
-{
- int ret;
-
- dev_dbg(&skt->dev, "suspending socket\n");
-
- mutex_lock(&skt->skt_mutex);
- do {
- if (!(skt->state & SOCKET_PRESENT)) {
- ret = -ENODEV;
- break;
- }
- if (skt->state & SOCKET_CARDBUS) {
- ret = -EPERM;
- break;
- }
- if (skt->callback) {
- ret = skt->callback->suspend(skt);
- if (ret)
- break;
- }
- ret = socket_suspend(skt);
- } while (0);
- mutex_unlock(&skt->skt_mutex);
-
- return ret;
-} /* suspend_card */
-EXPORT_SYMBOL(pcmcia_suspend_card);
-
-
-int pcmcia_resume_card(struct pcmcia_socket *skt)
-{
- int ret;
-
- dev_dbg(&skt->dev, "waking up socket\n");
-
- mutex_lock(&skt->skt_mutex);
- do {
- if (!(skt->state & SOCKET_PRESENT)) {
- ret = -ENODEV;
- break;
- }
- if (skt->state & SOCKET_CARDBUS) {
- ret = -EPERM;
- break;
- }
- ret = socket_resume(skt);
- if (!ret && skt->callback)
- skt->callback->resume(skt);
- } while (0);
- mutex_unlock(&skt->skt_mutex);
-
- return ret;
-} /* resume_card */
-EXPORT_SYMBOL(pcmcia_resume_card);
-
-
-/* These handle user requests to eject or insert a card. */
-int pcmcia_eject_card(struct pcmcia_socket *skt)
-{
- int ret;
-
- dev_dbg(&skt->dev, "user eject request\n");
-
- mutex_lock(&skt->skt_mutex);
- do {
- if (!(skt->state & SOCKET_PRESENT)) {
- ret = -ENODEV;
- break;
- }
-
- ret = send_event(skt, CS_EVENT_EJECTION_REQUEST, CS_EVENT_PRI_LOW);
- if (ret != 0) {
- ret = -EINVAL;
- break;
- }
-
- socket_remove(skt);
- ret = 0;
- } while (0);
- mutex_unlock(&skt->skt_mutex);
-
- return ret;
-} /* eject_card */
-EXPORT_SYMBOL(pcmcia_eject_card);
-
-
-int pcmcia_insert_card(struct pcmcia_socket *skt)
-{
- int ret;
-
- dev_dbg(&skt->dev, "user insert request\n");
-
- mutex_lock(&skt->skt_mutex);
- do {
- if (skt->state & SOCKET_PRESENT) {
- ret = -EBUSY;
- break;
- }
- if (socket_insert(skt) == -ENODEV) {
- ret = -ENODEV;
- break;
- }
- ret = 0;
- } while (0);
- mutex_unlock(&skt->skt_mutex);
-
- return ret;
-} /* insert_card */
-EXPORT_SYMBOL(pcmcia_insert_card);
-
-
static int pcmcia_socket_uevent(struct device *dev,
struct kobj_uevent_env *env)
{
projects / mirror_ubuntu-artful-kernel.git / blobdiff