[PATCH] pcmcia: warn if driver requests exclusive, but gets a shared IRQ
[linux-3.10.git] / drivers / pcmcia / socket_sysfs.c
index 7a77446..c5d7476 100644 (file)
@@ -12,7 +12,6 @@
 #include <linux/moduleparam.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
-#include <linux/config.h>
 #include <linux/string.h>
 #include <linux/major.h>
 #include <linux/errno.h>
@@ -25,6 +24,7 @@
 #include <linux/pm.h>
 #include <linux/pci.h>
 #include <linux/device.h>
+#include <linux/mutex.h>
 #include <asm/system.h>
 #include <asm/irq.h>
 
@@ -98,6 +98,30 @@ static ssize_t pccard_store_insert(struct class_device *dev, const char *buf, si
 }
 static CLASS_DEVICE_ATTR(card_insert, 0200, NULL, pccard_store_insert);
 
+
+static ssize_t pccard_show_card_pm_state(struct class_device *dev, char *buf)
+{
+       struct pcmcia_socket *s = to_socket(dev);
+       return sprintf(buf, "%s\n", s->state & SOCKET_SUSPEND ? "off" : "on");
+}
+
+static ssize_t pccard_store_card_pm_state(struct class_device *dev, const char *buf, size_t count)
+{
+       ssize_t ret = -EINVAL;
+       struct pcmcia_socket *s = to_socket(dev);
+
+       if (!count)
+               return -EINVAL;
+
+       if (!(s->state & SOCKET_SUSPEND) && !strncmp(buf, "off", 3))
+               ret = pcmcia_suspend_card(s);
+       else if ((s->state & SOCKET_SUSPEND) && !strncmp(buf, "on", 2))
+               ret = pcmcia_resume_card(s);
+
+       return ret ? -ENODEV : count;
+}
+static CLASS_DEVICE_ATTR(card_pm_state, 0644, pccard_show_card_pm_state, pccard_store_card_pm_state);
+
 static ssize_t pccard_store_eject(struct class_device *dev, const char *buf, size_t count)
 {
        ssize_t ret;
@@ -159,7 +183,7 @@ static ssize_t pccard_store_resource(struct class_device *dev, const char *buf,
                s->resource_setup_done = 1;
        spin_unlock_irqrestore(&s->lock, flags);
 
-       down(&s->skt_sem);
+       mutex_lock(&s->skt_mutex);
        if ((s->callback) &&
            (s->state & SOCKET_PRESENT) &&
            !(s->state & SOCKET_CARDBUS)) {
@@ -168,7 +192,7 @@ static ssize_t pccard_store_resource(struct class_device *dev, const char *buf,
                        module_put(s->callback->owner);
                }
        }
-       up(&s->skt_sem);
+       mutex_unlock(&s->skt_mutex);
 
        return count;
 }
@@ -298,7 +322,7 @@ static ssize_t pccard_store_cis(struct kobject *kobj, char *buf, loff_t off, siz
        kfree(cis);
 
        if (!ret) {
-               down(&s->skt_sem);
+               mutex_lock(&s->skt_mutex);
                if ((s->callback) && (s->state & SOCKET_PRESENT) &&
                    !(s->state & SOCKET_CARDBUS)) {
                        if (try_module_get(s->callback->owner)) {
@@ -306,7 +330,7 @@ static ssize_t pccard_store_cis(struct kobject *kobj, char *buf, loff_t off, siz
                                module_put(s->callback->owner);
                        }
                }
-               up(&s->skt_sem);
+               mutex_unlock(&s->skt_mutex);
        }
 
 
@@ -320,6 +344,7 @@ static struct class_device_attribute *pccard_socket_attributes[] = {
        &class_device_attr_card_vpp,
        &class_device_attr_card_vcc,
        &class_device_attr_card_insert,
+       &class_device_attr_card_pm_state,
        &class_device_attr_card_eject,
        &class_device_attr_card_irq_mask,
        &class_device_attr_available_resources_setup_done,