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authorGreg Kroah-Hartman <gregkh@suse.de>2010-02-17 21:57:05 +0300
committerGreg Kroah-Hartman <gregkh@suse.de>2010-03-08 04:04:52 +0300
commit8e9394ce2412254ec69fd2a4f3e44a66eade2297 (patch)
tree355f25148b4ce3f5cfebeaf0939d71cb6beaf88b /drivers/firewire
parent62e877b893e6350c900d381f353aa62ed48dcc97 (diff)
downloadlinux-8e9394ce2412254ec69fd2a4f3e44a66eade2297.tar.xz
Driver core: create lock/unlock functions for struct device
In the future, we are going to be changing the lock type for struct device (once we get the lockdep infrastructure properly worked out) To make that changeover easier, and to possibly burry the lock in a different part of struct device, let's create some functions to lock and unlock a device so that no out-of-core code needs to be changed in the future. This patch creates the device_lock/unlock/trylock() functions, and converts all in-tree users to them. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jean Delvare <khali@linux-fr.org> Cc: Dave Young <hidave.darkstar@gmail.com> Cc: Ming Lei <tom.leiming@gmail.com> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Phil Carmody <ext-phil.2.carmody@nokia.com> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Pavel Machek <pavel@ucw.cz> Cc: Len Brown <len.brown@intel.com> Cc: Magnus Damm <damm@igel.co.jp> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: Stefan Richter <stefanr@s5r6.in-berlin.de> Cc: David Brownell <dbrownell@users.sourceforge.net> Cc: Vegard Nossum <vegard.nossum@gmail.com> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Cc: Alex Chiang <achiang@hp.com> Cc: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andrew Patterson <andrew.patterson@hp.com> Cc: Yu Zhao <yu.zhao@intel.com> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Samuel Ortiz <sameo@linux.intel.com> Cc: Wolfram Sang <w.sang@pengutronix.de> Cc: CHENG Renquan <rqcheng@smu.edu.sg> Cc: Oliver Neukum <oliver@neukum.org> Cc: Frans Pop <elendil@planet.nl> Cc: David Vrabel <david.vrabel@csr.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/firewire')
-rw-r--r--drivers/firewire/core-device.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/firewire/core-device.c b/drivers/firewire/core-device.c
index 014cabd3afda..5db0518c66da 100644
--- a/drivers/firewire/core-device.c
+++ b/drivers/firewire/core-device.c
@@ -33,7 +33,6 @@
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/rwsem.h>
-#include <linux/semaphore.h>
#include <linux/spinlock.h>
#include <linux/string.h>
#include <linux/workqueue.h>
@@ -828,9 +827,9 @@ static int update_unit(struct device *dev, void *data)
struct fw_driver *driver = (struct fw_driver *)dev->driver;
if (is_fw_unit(dev) && driver != NULL && driver->update != NULL) {
- down(&dev->sem);
+ device_lock(dev);
driver->update(unit);
- up(&dev->sem);
+ device_unlock(dev);
}
return 0;