[PATCH 04/12] pcmcia: lock ops->set_socket
Dominik Brodowski
linux at dominikbrodowski.net
Sat Jan 16 07:42:47 EST 2010
As a side effect,
socket_state_t socket;
u_int state;
u_int suspended_state;
are properly protected now.
Signed-off-by: Dominik Brodowski <linux at dominikbrodowski.net>
---
drivers/pcmcia/cs.c | 21 +++++++++++++++++----
drivers/pcmcia/pcmcia_resource.c | 15 +++++++++++++--
2 files changed, 30 insertions(+), 6 deletions(-)
diff --git a/drivers/pcmcia/cs.c b/drivers/pcmcia/cs.c
index 91aa1f2..07673d9 100644
--- a/drivers/pcmcia/cs.c
+++ b/drivers/pcmcia/cs.c
@@ -383,6 +383,8 @@ static void socket_shutdown(struct pcmcia_socket *s)
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;
@@ -410,6 +412,7 @@ static void socket_shutdown(struct pcmcia_socket *s)
}
s->state &= ~SOCKET_INUSE;
+ mutex_unlock(&s->ops_mutex);
}
static int socket_setup(struct pcmcia_socket *skt, int initial_delay)
@@ -498,6 +501,7 @@ static int socket_insert(struct pcmcia_socket *skt)
dev_dbg(&skt->dev, "insert\n");
+ mutex_lock(&skt->ops_mutex);
WARN_ON(skt->state & SOCKET_INUSE);
skt->state |= SOCKET_INUSE;
@@ -517,9 +521,11 @@ static int socket_insert(struct pcmcia_socket *skt)
}
#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);
}
@@ -531,6 +537,7 @@ static int socket_suspend(struct pcmcia_socket *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);
@@ -539,31 +546,34 @@ static int socket_suspend(struct pcmcia_socket *skt)
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);
- if (skt->resume_status) {
+ if (skt->resume_status)
socket_shutdown(skt);
return 0;
- }
if (skt->suspended_state != skt->state) {
dev_dbg(&skt->dev,
@@ -795,7 +805,10 @@ int pcmcia_reset_card(struct pcmcia_socket *skt)
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);
diff --git a/drivers/pcmcia/pcmcia_resource.c b/drivers/pcmcia/pcmcia_resource.c
index 4e0aaec..f365ecb 100644
--- a/drivers/pcmcia/pcmcia_resource.c
+++ b/drivers/pcmcia/pcmcia_resource.c
@@ -266,6 +266,7 @@ int pcmcia_modify_configuration(struct pcmcia_device *p_dev,
}
if (mod->Attributes & CONF_IRQ_CHANGE_VALID) {
+ mutex_lock(&s->ops_mutex);
if (mod->Attributes & CONF_ENABLE_IRQ) {
c->Attributes |= CONF_ENABLE_IRQ;
s->socket.io_irq = s->irq.AssignedIRQ;
@@ -274,6 +275,7 @@ int pcmcia_modify_configuration(struct pcmcia_device *p_dev,
s->socket.io_irq = 0;
}
s->ops->set_socket(s, &s->socket);
+ mutex_unlock(&s->ops_mutex);
}
if (mod->Attributes & CONF_VCC_CHANGE_VALID) {
@@ -288,12 +290,15 @@ int pcmcia_modify_configuration(struct pcmcia_device *p_dev,
dev_dbg(&s->dev, "Vpp1 and Vpp2 must be the same\n");
return -EINVAL;
}
+ mutex_lock(&s->ops_mutex);
s->socket.Vpp = mod->Vpp1;
if (s->ops->set_socket(s, &s->socket)) {
+ mutex_unlock(&s->ops_mutex);
dev_printk(KERN_WARNING, &s->dev,
"Unable to set VPP\n");
return -EIO;
}
+ mutex_unlock(&s->ops_mutex);
} else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) ||
(mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
dev_dbg(&s->dev, "changing Vcc is not allowed at this time\n");
@@ -336,6 +341,7 @@ int pcmcia_release_configuration(struct pcmcia_device *p_dev)
config_t *c = p_dev->function_config;
int i;
+ mutex_lock(&s->ops_mutex);
if (p_dev->_locked) {
p_dev->_locked = 0;
if (--(s->lock_count) == 0) {
@@ -347,7 +353,6 @@ int pcmcia_release_configuration(struct pcmcia_device *p_dev)
}
if (c->state & CONFIG_LOCKED) {
c->state &= ~CONFIG_LOCKED;
- mutex_lock(&s->ops_mutex);
if (c->state & CONFIG_IO_REQ)
for (i = 0; i < MAX_IO_WIN; i++) {
if (!s->io[i].res)
@@ -358,8 +363,8 @@ int pcmcia_release_configuration(struct pcmcia_device *p_dev)
io.map = i;
s->ops->set_io_map(s, &io);
}
- mutex_unlock(&s->ops_mutex);
}
+ mutex_unlock(&s->ops_mutex);
return 0;
} /* pcmcia_release_configuration */
@@ -493,9 +498,11 @@ int pcmcia_request_configuration(struct pcmcia_device *p_dev,
return -EACCES;
}
+ mutex_lock(&s->ops_mutex);
/* Do power control. We don't allow changes in Vcc. */
s->socket.Vpp = req->Vpp;
if (s->ops->set_socket(s, &s->socket)) {
+ mutex_unlock(&s->ops_mutex);
dev_printk(KERN_WARNING, &s->dev,
"Unable to set socket state\n");
return -EINVAL;
@@ -518,6 +525,7 @@ int pcmcia_request_configuration(struct pcmcia_device *p_dev,
s->socket.io_irq = 0;
s->ops->set_socket(s, &s->socket);
s->lock_count++;
+ mutex_unlock(&s->ops_mutex);
/* Set up CIS configuration registers */
base = c->ConfigBase = req->ConfigBase;
@@ -698,6 +706,7 @@ int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req)
return -EBUSY;
}
+ mutex_lock(&s->ops_mutex);
/* Decide what type of interrupt we are registering */
type = 0;
if (s->functions > 1) /* All of this ought to be handled higher up */
@@ -791,6 +800,8 @@ int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req)
pcmcia_used_irq[irq]++;
#endif
+ mutex_unlock(&s->ops_mutex);
+
return 0;
} /* pcmcia_request_irq */
EXPORT_SYMBOL(pcmcia_request_irq);
--
1.6.3.3
More information about the linux-pcmcia
mailing list