linux-kernel - [PATCH v5 1/5] staging: unisys: remove redundant variable

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Date:	Tue, 24 Mar 2015 20:47:26 +0530
From:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:	Benjamin Romer <benjamin.romer@...sys.com>,
	David Kershner <david.kershner@...sys.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	sparmaintainer@...sys.com, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org,
	Dan Carpenter <dan.carpenter@...cle.com>,
	Sudip Mukherjee <sudipm.mukherjee@...il.com>
Subject: [PATCH v5 1/5] staging: unisys: remove redundant variable

remove the variable "registered", which was used in the cleanup() to
detect if the driver has successfully initialized. the cleanup()
is called from module_exit, so its obvious that the module has
successfully initialized. if the initialization had failed, then
we will never be in the cleanup().

Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>
---

v5: reordered the patch series
v4: messed up the subject in v3
v3: broke the previous patch in series

 drivers/staging/unisys/visorchipset/file.c | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/drivers/staging/unisys/visorchipset/file.c b/drivers/staging/unisys/visorchipset/file.c
index 9ca7f1e..b426762 100644
--- a/drivers/staging/unisys/visorchipset/file.c
+++ b/drivers/staging/unisys/visorchipset/file.c
@@ -31,7 +31,6 @@
 static struct cdev file_cdev;
 static struct visorchannel **file_controlvm_channel;
 static dev_t majordev = -1; /**< indicates major num for device */
-static BOOL registered = FALSE;
 
 static int visorchipset_open(struct inode *inode, struct file *file);
 static int visorchipset_release(struct inode *inode, struct file *file);
@@ -62,12 +61,10 @@ visorchipset_file_init(dev_t major_dev, struct visorchannel **controlvm_channel)
 		/* dynamic major device number registration required */
 		if (alloc_chrdev_region(&majordev, 0, 1, MYDRVNAME) < 0)
 			return -1;
-		registered = TRUE;
 	} else {
 		/* static major device number registration required */
 		if (register_chrdev_region(majordev, 1, MYDRVNAME) < 0)
 			return -1;
-		registered = TRUE;
 	}
 	rc = cdev_add(&file_cdev, MKDEV(MAJOR(majordev), 0), 1);
 	if (rc  < 0)
@@ -81,12 +78,9 @@ visorchipset_file_cleanup(void)
 	if (file_cdev.ops != NULL)
 		cdev_del(&file_cdev);
 	file_cdev.ops = NULL;
-	if (registered) {
-		if (MAJOR(majordev) >= 0) {
-			unregister_chrdev_region(majordev, 1);
-			majordev = MKDEV(0, 0);
-		}
-		registered = FALSE;
+	if (MAJOR(majordev) >= 0) {
+		unregister_chrdev_region(majordev, 1);
+		majordev = MKDEV(0, 0);
 	}
 }
 
-- 
1.8.1.2

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