lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

s390: remove driver_data direct access of struct device

Browse Source 
In the near future, the driver core is going to not allow direct access
to the driver_data pointer in struct device.  Instead, the functions
dev_get_drvdata() and dev_set_drvdata() should be used.  These functions
have been around since the beginning, so are backwards compatible with
all older kernel versions.

Thanks to Sebastian Ott <sebott@linux.vnet.ibm.com> for fixing a few
typos in my original version of this patch.

Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Sebastian Ott <sebott@linux.vnet.ibm.com>
Cc: linux-s390@vger.kernel.org
Cc: linux390@de.ibm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Greg Kroah-Hartman
2009-05-04 12:40:54 -07:00
parent 61616115d7
commit dff59b64af
11 changed files with 105 additions and 104 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/s390/char/vmur.c
View File

@@ -78,11 +78,11 @@ static DEFINE_MUTEX(vmur_mutex);
*
* Each ur device (urd) contains a reference to its corresponding ccw device
* (cdev) using the urd->cdev pointer. Each ccw device has a reference to the
* ur device using the cdev->dev.driver_data pointer.
* ur device using dev_get_drvdata(&cdev->dev) pointer.
*
* urd references:
* - ur_probe gets a urd reference, ur_remove drops the reference
* (cdev->dev.driver_data)
* dev_get_drvdata(&cdev->dev)
* - ur_open gets a urd reference, ur_relase drops the reference
* (urf->urd)
*
@@ -90,7 +90,7 @@ static DEFINE_MUTEX(vmur_mutex);
* - urdev_alloc get a cdev reference (urd->cdev)
* - urdev_free drops the cdev reference (urd->cdev)
*
* Setting and clearing of cdev->dev.driver_data is protected by the ccwdev lock
* Setting and clearing of dev_get_drvdata(&cdev->dev) is protected by the ccwdev lock
*/
static struct urdev *urdev_alloc(struct ccw_device *cdev)
{
@@ -129,7 +129,7 @@ static struct urdev *urdev_get_from_cdev(struct ccw_device *cdev)
unsigned long flags;
spin_lock_irqsave(get_ccwdev_lock(cdev), flags);
urd = cdev->dev.driver_data;
urd = dev_get_drvdata(&cdev->dev);
if (urd)
urdev_get(urd);
spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
@@ -286,7 +286,7 @@ static void ur_int_handler(struct ccw_device *cdev, unsigned long intparm,
TRACE("ur_int_handler: unsolicited interrupt\n");
return;
}
urd = cdev->dev.driver_data;
urd = dev_get_drvdata(&cdev->dev);
BUG_ON(!urd);
/* On special conditions irb is an error pointer */
if (IS_ERR(irb))
@@ -832,7 +832,7 @@ static int ur_probe(struct ccw_device *cdev)
goto fail_remove_attr;
}
spin_lock_irq(get_ccwdev_lock(cdev));
cdev->dev.driver_data = urd;
dev_set_drvdata(&cdev->dev, urd);
spin_unlock_irq(get_ccwdev_lock(cdev));
mutex_unlock(&vmur_mutex);
@@ -972,8 +972,8 @@ static void ur_remove(struct ccw_device *cdev)
ur_remove_attributes(&cdev->dev);
spin_lock_irqsave(get_ccwdev_lock(cdev), flags);
urdev_put(cdev->dev.driver_data);
cdev->dev.driver_data = NULL;
urdev_put(dev_get_drvdata(&cdev->dev));
dev_set_drvdata(&cdev->dev, NULL);
spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
mutex_unlock(&vmur_mutex);