linux-kernel - [PATCH v2 2/3] staging: unisys: use error codes

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Date:	Fri, 27 Mar 2015 15:26:10 +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,
	Sudip Mukherjee <sudipm.mukherjee@...il.com>
Subject: [PATCH v2 2/3] staging: unisys: use error codes

we were just returning -1 to the calling function which was again
returning that if the module failed to load. Now we are returning the
actual error codes.

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

v2: removed extra space

 drivers/staging/unisys/visorchipset/file.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/unisys/visorchipset/file.c b/drivers/staging/unisys/visorchipset/file.c
index 074c285..552febc 100644
--- a/drivers/staging/unisys/visorchipset/file.c
+++ b/drivers/staging/unisys/visorchipset/file.c
@@ -56,18 +56,20 @@ visorchipset_file_init(dev_t major_dev, struct visorchannel **controlvm_channel)
 	cdev_init(&file_cdev, &visorchipset_fops);
 	file_cdev.owner = THIS_MODULE;
 	if (MAJOR(major_dev) == 0) {
+		rc = alloc_chrdev_region(&major_dev, 0, 1, MYDRVNAME);
 		/* dynamic major device number registration required */
-		if (alloc_chrdev_region(&major_dev, 0, 1, MYDRVNAME) < 0)
-			return -1;
+		if (rc < 0)
+			return rc;
 	} else {
 		/* static major device number registration required */
-		if (register_chrdev_region(major_dev, 1, MYDRVNAME) < 0)
-			return -1;
+		rc = register_chrdev_region(major_dev, 1, MYDRVNAME);
+		if (rc < 0)
+			return rc;
 	}
 	rc = cdev_add(&file_cdev, MKDEV(MAJOR(major_dev), 0), 1);
 	if (rc < 0) {
 		unregister_chrdev_region(major_dev, 1);
-		return -1;
+		return rc;
 	}
 	return 0;
 }
-- 
1.8.1.2

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