From e28dbb0661ca49ada2d6a307a1ec93dd75d515e0 Mon Sep 17 00:00:00 2001 From: Ming Lei Date: Fri, 16 Dec 2011 22:20:44 +0800 Subject: [PATCH] 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 Signed-off-by: Greg Kroah-Hartman --- drivers/usb/usb-skeleton.c | 22 ++++------------------ 1 file 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); -- 2.11.4.GIT