[PATCH] PCMCIA: fix __must_check warnings

[linux-2.6-omap-h63xx.git] / drivers / pcmcia / ds.c

diff --git a/drivers/pcmcia/ds.c b/drivers/pcmcia/ds.c
index ae10d1eed65e2417bf3077dffe7eb7963a0cb2f7..0f701921c13e6e9a781844597380416d19c87c26 100644 (file)
--- a/drivers/pcmcia/ds.c
+++ b/drivers/pcmcia/ds.c
@@ -236,11 +236,11 @@ static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
 /**
  * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
  * @dev - the pcmcia device which needs a CIS override
- * @filename - requested filename in /lib/firmware/cis/
+ * @filename - requested filename in /lib/firmware/
  *
  * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
  * the one provided by the card is broken. The firmware files reside in
- * /lib/firmware/cis/ in userspace.
+ * /lib/firmware/ in userspace.
  */
 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 {
@@ -298,9 +298,6 @@ static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filenam
  *
  * Registers a PCMCIA driver with the PCMCIA bus core.
  */
-static int pcmcia_device_probe(struct device *dev);
-static int pcmcia_device_remove(struct device * dev);
-
 int pcmcia_register_driver(struct pcmcia_driver *driver)
 {
        if (!driver)
@@ -400,7 +397,7 @@ static int pcmcia_device_probe(struct device * dev)
         * call which will then check whether there are two
         * pseudo devices, and if not, add the second one.
         */
-       did = (struct pcmcia_device_id *) p_dev->dev.driver_data;
+       did = p_dev->dev.driver_data;
        if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
            (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
                pcmcia_add_pseudo_device(p_dev->socket);
@@ -448,7 +445,6 @@ static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *le
        return;
 }
 
-
 static int pcmcia_device_remove(struct device * dev)
 {
        struct pcmcia_device *p_dev;
@@ -463,7 +459,7 @@ static int pcmcia_device_remove(struct device * dev)
         * pseudo multi-function card, we need to unbind
         * all devices
         */
-       did = (struct pcmcia_device_id *) p_dev->dev.driver_data;
+       did = p_dev->dev.driver_data;
        if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
            (p_dev->socket->device_count != 0) &&
            (p_dev->device_no == 0))
@@ -476,6 +472,8 @@ static int pcmcia_device_remove(struct device * dev)
        if (p_drv->remove)
                p_drv->remove(p_dev);
 
+       p_dev->dev_node = NULL;
+
        /* check for proper unloading */
        if (p_dev->_irq || p_dev->_io || p_dev->_locked)
                printk(KERN_INFO "pcmcia: driver %s did not release config properly\n",
@@ -628,7 +626,7 @@ struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int f
                }
 
        /* Add to the list in pcmcia_bus_socket */
-       list_add_tail(&p_dev->socket_device_list, &s->devices_list);
+       list_add(&p_dev->socket_device_list, &s->devices_list);
 
        spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 
@@ -719,6 +717,7 @@ static int pcmcia_requery(struct device *dev, void * _data)
 static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
 {
        int no_devices=0;
+       int ret = 0;
        unsigned long flags;
 
        /* must be called with skt_mutex held */
@@ -731,7 +730,7 @@ static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
         * missing resource information or other trouble, we need to
         * do this now. */
        if (no_devices) {
-               int ret = pcmcia_card_add(skt);
+               ret = pcmcia_card_add(skt);
                if (ret)
                        return;
        }
@@ -743,7 +742,9 @@ static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
 
        /* we re-scan all devices, not just the ones connected to this
         * socket. This does not matter, though. */
-       bus_rescan_devices(&pcmcia_bus_type);
+       ret = bus_rescan_devices(&pcmcia_bus_type);
+       if (ret)
+               printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n");
 }
 
 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
@@ -1003,6 +1004,7 @@ static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
                struct device_attribute *attr, const char *buf, size_t count)
 {
        struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
+       int ret;
 
        if (!count)
                return -EINVAL;
@@ -1011,7 +1013,10 @@ static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
        p_dev->allow_func_id_match = 1;
        mutex_unlock(&p_dev->socket->skt_mutex);
 
-       bus_rescan_devices(&pcmcia_bus_type);
+       ret = bus_rescan_devices(&pcmcia_bus_type);
+       if (ret)
+               printk(KERN_INFO "pcmcia: bus_rescan_devices failed after "
+                      "allowing func_id matches\n");
 
        return count;
 }
@@ -1145,6 +1150,12 @@ static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
 {
        struct pcmcia_socket *s = pcmcia_get_socket(skt);
 
+       if (!s) {
+               printk(KERN_ERR "PCMCIA obtaining reference to socket %p " \
+                       "failed, event 0x%x lost!\n", skt, event);
+               return -ENODEV;
+       }
+
        ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
               event, priority, skt);
 
@@ -1288,10 +1299,22 @@ struct bus_type pcmcia_bus_type = {
 
 static int __init init_pcmcia_bus(void)
 {
+       int ret;
+
        spin_lock_init(&pcmcia_dev_list_lock);
 
-       bus_register(&pcmcia_bus_type);
-       class_interface_register(&pcmcia_bus_interface);
+       ret = bus_register(&pcmcia_bus_type);
+       if (ret < 0) {
+               printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
+               return ret;
+       }
+       ret = class_interface_register(&pcmcia_bus_interface);
+       if (ret < 0) {
+               printk(KERN_WARNING
+                       "pcmcia: class_interface_register error: %d\n", ret);
+               bus_unregister(&pcmcia_bus_type);
+               return ret;
+       }
 
        pcmcia_setup_ioctl();