Merge git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched

[linux-2.6] / drivers / usb / misc / ftdi-elan.c

diff --git a/drivers/usb/misc/ftdi-elan.c b/drivers/usb/misc/ftdi-elan.c
index e0f122e131d720e0580382f88845c2bf47cde5a7..d3d8cd6ff103b5d399b992be5dee264a652ae40f 100644 (file)
--- a/drivers/usb/misc/ftdi-elan.c
+++ b/drivers/usb/misc/ftdi-elan.c
@@ -44,6 +44,7 @@
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/kref.h>
+#include <linux/mutex.h>
 #include <asm/uaccess.h>
 #include <linux/usb.h>
 #include <linux/workqueue.h>
@@ -64,7 +65,7 @@ static struct workqueue_struct *respond_queue;
 * ftdi_module_lock exists to protect access to global variables
 *
 */
-static struct semaphore ftdi_module_lock;
+static struct mutex ftdi_module_lock;
 static int ftdi_instances = 0;
 static struct list_head ftdi_static_list;
 /*
@@ -199,10 +200,10 @@ static void ftdi_elan_delete(struct kref *kref)
         dev_warn(&ftdi->udev->dev, "FREEING ftdi=%p\n", ftdi);
         usb_put_dev(ftdi->udev);
         ftdi->disconnected += 1;
-        down(&ftdi_module_lock);
+        mutex_lock(&ftdi_module_lock);
         list_del_init(&ftdi->ftdi_list);
         ftdi_instances -= 1;
-        up(&ftdi_module_lock);
+        mutex_unlock(&ftdi_module_lock);
         kfree(ftdi->bulk_in_buffer);
         ftdi->bulk_in_buffer = NULL;
 }
@@ -746,10 +747,12 @@ static ssize_t ftdi_elan_read(struct file *file, char __user *buffer,
 static void ftdi_elan_write_bulk_callback(struct urb *urb)
 {
         struct usb_ftdi *ftdi = (struct usb_ftdi *)urb->context;
-        if (urb->status && !(urb->status == -ENOENT || urb->status ==
-                -ECONNRESET || urb->status == -ESHUTDOWN)) {
+       int status = urb->status;
+
+       if (status && !(status == -ENOENT || status == -ECONNRESET ||
+           status == -ESHUTDOWN)) {
                 dev_err(&ftdi->udev->dev, "urb=%p write bulk status received: %"
-                        "d\n", urb, urb->status);
+                        "d\n", urb, status);
         }
         usb_buffer_free(urb->dev, urb->transfer_buffer_length,
                 urb->transfer_buffer, urb->transfer_dma);
@@ -2774,16 +2777,18 @@ static int ftdi_elan_probe(struct usb_interface *interface,
         size_t buffer_size;
         int i;
         int retval = -ENOMEM;
-        struct usb_ftdi *ftdi = kmalloc(sizeof(struct usb_ftdi), GFP_KERNEL);
-        if (ftdi == NULL) {
+        struct usb_ftdi *ftdi;
+
+       ftdi = kzalloc(sizeof(struct usb_ftdi), GFP_KERNEL);
+       if (!ftdi) {
                 printk(KERN_ERR "Out of memory\n");
                 return -ENOMEM;
         }
-        memset(ftdi, 0x00, sizeof(struct usb_ftdi));
-        down(&ftdi_module_lock);
+
+        mutex_lock(&ftdi_module_lock);
         list_add_tail(&ftdi->ftdi_list, &ftdi_static_list);
         ftdi->sequence_num = ++ftdi_instances;
-        up(&ftdi_module_lock);
+        mutex_unlock(&ftdi_module_lock);
         ftdi_elan_init_kref(ftdi);
         init_MUTEX(&ftdi->sw_lock);
         ftdi->udev = usb_get_dev(interface_to_usbdev(interface));
@@ -2909,7 +2914,7 @@ static int __init ftdi_elan_init(void)
         int result;
         printk(KERN_INFO "driver %s built at %s on %s\n", ftdi_elan_driver.name,
               __TIME__, __DATE__);
-        init_MUTEX(&ftdi_module_lock);
+        mutex_init(&ftdi_module_lock);
         INIT_LIST_HEAD(&ftdi_static_list);
         status_queue = create_singlethread_workqueue("ftdi-status-control");
        if (!status_queue)