USB: usb-skeleton.c: cleanup open_count

It is not necessary to use the 'open_count' for handling
runtime pm only, because runtinme pm has built-in counter
to handle this, so remove it to make code clean.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 4 insertions, 18 deletions

diff --git a/drivers/usb/usb-skeleton.c b/drivers/usb/usb-skeleton.c
index 3635f9e3755..d9a95847ec1 100644
--- a/drivers/usb/usb-skeleton.c
+++ b/drivers/usb/usb-skeleton.c
@@ -62,7 +62,6 @@ struct usb_skel {
         __u8                    bulk_in_endpointAddr;   /* the address of the bulk in endpoint */
         __u8                    bulk_out_endpointAddr;  /* the address of the bulk out endpoint */
         int                     errors;                 /* the last request tanked */
-        int                     open_count;             /* count the number of openers */
         bool                    ongoing_read;           /* a read is going on */
         bool                    processed_urb;          /* indicates we haven't processed the urb */
         spinlock_t              err_lock;               /* lock for errors */
@@ -122,22 +121,9 @@ static int skel_open(struct inode *inode, struct file *file)
                 goto out_err;
         }
 
-        if (!dev->open_count++) {
-                retval = usb_autopm_get_interface(interface);
-                        if (retval) {
-                                dev->open_count--;
-                                mutex_unlock(&dev->io_mutex);
-                                kref_put(&dev->kref, skel_delete);
-                                goto exit;
-                        }
-        } /* else { //uncomment this block if you want exclusive open
-                retval = -EBUSY;
-                dev->open_count--;
-                mutex_unlock(&dev->io_mutex);
-                kref_put(&dev->kref, skel_delete);
-                goto exit;
-        } */
-        /* prevent the device from being autosuspended */
+        retval = usb_autopm_get_interface(interface);
+        if (retval)
+                goto out_err;
 
         /* save our object in the file's private structure */
         file->private_data = dev;
@@ -161,7 +147,7 @@ static int skel_release(struct inode *inode, struct file *file)
 
         /* allow the device to be autosuspended */
         mutex_lock(&dev->io_mutex);
-        if (!--dev->open_count && dev->interface)
+        if (dev->interface)
                 usb_autopm_put_interface(dev->interface);
         mutex_unlock(&dev->io_mutex);