linux-kernel - [PATCH 15/31] uio: Don't clear driver data

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1287771916-15016-15-git-send-email-gregkh@suse.de>
Date:	Fri, 22 Oct 2010 11:25:00 -0700
From:	Greg Kroah-Hartman <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org
Cc:	"Eric W. Biederman" <ebiederm@...stanetworks.com>,
	"Hans J. Koch" <hjk@...utronix.de>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: [PATCH 15/31] uio: Don't clear driver data

From: Eric W. Biederman <ebiederm@...stanetworks.com>

Currently uio sets it's driver data to NULL just as it is unregistering
attributes.  sysfs maks the guaranatee that it will not call attributes
after device_destroy is called so this is unncessary and leads to lots
of unnecessary code in uio.c

Signed-off-by: Eric W. Biederman <ebiederm@...stanetworks.com>
Reviewed-by: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Hans J. Koch <hjk@...utronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
 drivers/uio/uio.c |   17 +++--------------
 1 files changed, 3 insertions(+), 14 deletions(-)

diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index bc774cc..8132288 100644
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -229,10 +229,7 @@ static ssize_t show_name(struct device *dev,
 			 struct device_attribute *attr, char *buf)
 {
 	struct uio_device *idev = dev_get_drvdata(dev);
-	if (idev)
-		return sprintf(buf, "%s\n", idev->info->name);
-	else
-		return -ENODEV;
+	return sprintf(buf, "%s\n", idev->info->name);
 }
 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
 
@@ -240,10 +237,7 @@ static ssize_t show_version(struct device *dev,
 			    struct device_attribute *attr, char *buf)
 {
 	struct uio_device *idev = dev_get_drvdata(dev);
-	if (idev)
-		return sprintf(buf, "%s\n", idev->info->version);
-	else
-		return -ENODEV;
+	return sprintf(buf, "%s\n", idev->info->version);
 }
 static DEVICE_ATTR(version, S_IRUGO, show_version, NULL);
 
@@ -251,11 +245,7 @@ static ssize_t show_event(struct device *dev,
 			  struct device_attribute *attr, char *buf)
 {
 	struct uio_device *idev = dev_get_drvdata(dev);
-	if (idev)
-		return sprintf(buf, "%u\n",
-				(unsigned int)atomic_read(&idev->event));
-	else
-		return -ENODEV;
+	return sprintf(buf, "%u\n", (unsigned int)atomic_read(&idev->event));
 }
 static DEVICE_ATTR(event, S_IRUGO, show_event, NULL);
 
@@ -878,7 +868,6 @@ void uio_unregister_device(struct uio_info *info)
 
 	uio_dev_del_attributes(idev);
 
-	dev_set_drvdata(idev->dev, NULL);
 	device_destroy(uio_class, MKDEV(uio_major, idev->minor));
 	kfree(idev);
 
-- 
1.7.2

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/