linux-kernel - [PATCHv4 2/4] staging: vme

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Date:	Sat, 13 Jun 2015 16:34:02 +0300
From:	Dmitry Kalinkin <dmitry.kalinkin@...il.com>
To:	linux-kernel@...r.kernel.org, devel@...verdev.osuosl.org
Cc:	Martyn Welch <martyn.welch@...com>,
	Manohar Vanga <manohar.vanga@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Igor Alekseev <igor.alekseev@...p.ru>,
	Dmitry Kalinkin <dmitry.kalinkin@...il.com>
Subject: [PATCHv4 2/4] 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@...il.com>
Cc: Igor Alekseev <igor.alekseev@...p.ru>
---
 drivers/staging/vme/devices/vme_user.c | 44 ----------------------------------
 1 file changed, 44 deletions(-)

diff --git a/drivers/staging/vme/devices/vme_user.c b/drivers/staging/vme/devices/vme_user.c
index 8e46d60..a72f7a9 100644
--- a/drivers/staging/vme/devices/vme_user.c
+++ b/drivers/staging/vme/devices/vme_user.c
@@ -99,7 +99,6 @@ struct image_desc {
 	struct mutex mutex;	/* Mutex for locking image */
 	struct device *device;	/* Sysfs device */
 	struct vme_resource *resource;	/* VME resource */
-	int users;		/* Number of current users */
 	int mmap_count;		/* Number of current mmap's */
 };
 static struct image_desc image[VME_DEVS];
@@ -122,46 +121,6 @@ struct vme_user_vma_priv {
 };
 
 
-static int vme_user_open(struct inode *inode, struct file *file)
-{
-	int err;
-	unsigned int minor = MINOR(inode->i_rdev);
-
-	mutex_lock(&image[minor].mutex);
-	/* Allow device to be opened if a resource is needed and allocated. */
-	if (minor < CONTROL_MINOR && image[minor].resource == NULL) {
-		pr_err("No resources allocated for device\n");
-		err = -EINVAL;
-		goto err_res;
-	}
-
-	/* Increment user count */
-	image[minor].users++;
-
-	mutex_unlock(&image[minor].mutex);
-
-	return 0;
-
-err_res:
-	mutex_unlock(&image[minor].mutex);
-
-	return err;
-}
-
-static int vme_user_release(struct inode *inode, struct file *file)
-{
-	unsigned int minor = MINOR(inode->i_rdev);
-
-	mutex_lock(&image[minor].mutex);
-
-	/* Decrement user count */
-	image[minor].users--;
-
-	mutex_unlock(&image[minor].mutex);
-
-	return 0;
-}
-
 /*
  * We are going ot alloc a page during init per window for small transfers.
  * Small transfers will go VME -> buffer -> user space. Larger (more than a
@@ -596,8 +555,6 @@ static int vme_user_mmap(struct file *file, struct vm_area_struct *vma)
 }
 
 static const struct file_operations vme_user_fops = {
-	.open = vme_user_open,
-	.release = vme_user_release,
 	.read = vme_user_read,
 	.write = vme_user_write,
 	.llseek = vme_user_llseek,
@@ -670,7 +627,6 @@ static int vme_user_probe(struct vme_dev *vdev)
 		mutex_init(&image[i].mutex);
 		image[i].device = NULL;
 		image[i].resource = NULL;
-		image[i].users = 0;
 	}
 
 	/* Assign major and minor numbers for the driver */
-- 
1.8.3.1

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