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staging: vme_user: remove open/release
Checking for image[minor].resource != NULL is not needed since all resources are allocated before device is created. image[minor].users accounting is deleted because it's not being used. Signed-off-by: Dmitry Kalinkin <dmitry.kalinkin@gmail.com> Cc: Igor Alekseev <igor.alekseev@itep.ru> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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1 changed files with 0 additions and 44 deletions
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@ -99,7 +99,6 @@ struct image_desc {
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struct mutex mutex; /* Mutex for locking image */
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struct device *device; /* Sysfs device */
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struct vme_resource *resource; /* VME resource */
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int users; /* Number of current users */
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int mmap_count; /* Number of current mmap's */
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};
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static struct image_desc image[VME_DEVS];
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@ -122,46 +121,6 @@ struct vme_user_vma_priv {
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};
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static int vme_user_open(struct inode *inode, struct file *file)
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{
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int err;
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unsigned int minor = MINOR(inode->i_rdev);
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mutex_lock(&image[minor].mutex);
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/* Allow device to be opened if a resource is needed and allocated. */
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if (minor < CONTROL_MINOR && image[minor].resource == NULL) {
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pr_err("No resources allocated for device\n");
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err = -EINVAL;
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goto err_res;
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}
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/* Increment user count */
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image[minor].users++;
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mutex_unlock(&image[minor].mutex);
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return 0;
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err_res:
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mutex_unlock(&image[minor].mutex);
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return err;
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}
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static int vme_user_release(struct inode *inode, struct file *file)
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{
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unsigned int minor = MINOR(inode->i_rdev);
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mutex_lock(&image[minor].mutex);
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/* Decrement user count */
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image[minor].users--;
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mutex_unlock(&image[minor].mutex);
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return 0;
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}
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/*
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* We are going ot alloc a page during init per window for small transfers.
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* Small transfers will go VME -> buffer -> user space. Larger (more than a
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@ -596,8 +555,6 @@ static int vme_user_mmap(struct file *file, struct vm_area_struct *vma)
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}
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static const struct file_operations vme_user_fops = {
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.open = vme_user_open,
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.release = vme_user_release,
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.read = vme_user_read,
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.write = vme_user_write,
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.llseek = vme_user_llseek,
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@ -670,7 +627,6 @@ static int vme_user_probe(struct vme_dev *vdev)
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mutex_init(&image[i].mutex);
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image[i].device = NULL;
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image[i].resource = NULL;
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image[i].users = 0;
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}
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/* Assign major and minor numbers for the driver */
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