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authorDominik Brodowski <linux@dominikbrodowski.net>2010-01-16 00:26:33 +0100
committerDominik Brodowski <linux@dominikbrodowski.net>2010-02-17 17:48:16 +0100
commit9e86749cff70fca505c7c1a9dc760d193f27a059 (patch)
tree3017dc3c22c12c7ef53fd81de6d4869f212cef02 /drivers/pcmcia/pcmcia_resource.c
parent8533ee31cdc08fc1f2533e5f21f8e4abf6a57dfc (diff)
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pcmcia: lock ops->set_socket
As a side effect, socket_state_t socket; u_int state; u_int suspended_state; are properly protected now. Tested-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'drivers/pcmcia/pcmcia_resource.c')
-rw-r--r--drivers/pcmcia/pcmcia_resource.c15
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/pcmcia/pcmcia_resource.c b/drivers/pcmcia/pcmcia_resource.c
index 4e0aaec5cf9..f365ecb9c5c 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);