X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=kernel%2Fpm_qos_params.c;h=da9c2dda6a4e8ea8330841aee41851c022ab95ef;hb=e34456825de0d3ac4c4e8fe0bdc6b599404ea06f;hp=0afe32be4c8530851a912dde00a6ed5c0f24cf49;hpb=dd07a8db7283f52f347aee468007556944b5b393;p=linux-2.6-omap-h63xx.git

diff --git a/kernel/pm_qos_params.c b/kernel/pm_qos_params.c
index 0afe32be4c8..da9c2dda6a4 100644
--- a/kernel/pm_qos_params.c
+++ b/kernel/pm_qos_params.c
@@ -24,11 +24,12 @@
  * requirement that the application has is cleaned up when closes the file
  * pointer or exits the pm_qos_object will get an opportunity to clean up.
  *
- * mark gross mgross@linux.intel.com
+ * Mark Gross <mgross@linux.intel.com>
  */
 
 #include <linux/pm_qos_params.h>
 #include <linux/sched.h>
+#include <linux/smp_lock.h>
 #include <linux/spinlock.h>
 #include <linux/slab.h>
 #include <linux/time.h>
@@ -210,8 +211,8 @@ EXPORT_SYMBOL_GPL(pm_qos_requirement);
  * @value: defines the qos request
  *
  * This function inserts a new entry in the pm_qos_class list of requested qos
- * performance charactoistics.  It recomputes the agregate QoS expectations for
- * the pm_qos_class of parrameters.
+ * performance characteristics.  It recomputes the aggregate QoS expectations
+ * for the pm_qos_class of parameters.
  */
 int pm_qos_add_requirement(int pm_qos_class, char *name, s32 value)
 {
@@ -249,10 +250,10 @@ EXPORT_SYMBOL_GPL(pm_qos_add_requirement);
  * @name: identifies the request
  * @value: defines the qos request
  *
- * Updates an existing qos requierement for the pm_qos_class of parameters along
+ * Updates an existing qos requirement for the pm_qos_class of parameters along
  * with updating the target pm_qos_class value.
  *
- * If the named request isn't in the lest then no change is made.
+ * If the named request isn't in the list then no change is made.
  */
 int pm_qos_update_requirement(int pm_qos_class, char *name, s32 new_value)
 {
@@ -286,7 +287,7 @@ EXPORT_SYMBOL_GPL(pm_qos_update_requirement);
  * @pm_qos_class: identifies which list of qos request to us
  * @name: identifies the request
  *
- * Will remove named qos request from pm_qos_class list of parrameters and
+ * Will remove named qos request from pm_qos_class list of parameters and
  * recompute the current target value for the pm_qos_class.
  */
 void pm_qos_remove_requirement(int pm_qos_class, char *name)
@@ -318,7 +319,7 @@ EXPORT_SYMBOL_GPL(pm_qos_remove_requirement);
  * @notifier: notifier block managed by caller.
  *
  * will register the notifier into a notification chain that gets called
- * uppon changes to the pm_qos_class target value.
+ * upon changes to the pm_qos_class target value.
  */
  int pm_qos_add_notifier(int pm_qos_class, struct notifier_block *notifier)
 {
@@ -337,7 +338,7 @@ EXPORT_SYMBOL_GPL(pm_qos_add_notifier);
  * @notifier: notifier block to be removed.
  *
  * will remove the notifier from the notification chain that gets called
- * uppon changes to the pm_qos_class target value.
+ * upon changes to the pm_qos_class target value.
  */
 int pm_qos_remove_notifier(int pm_qos_class, struct notifier_block *notifier)
 {
@@ -358,15 +359,19 @@ static int pm_qos_power_open(struct inode *inode, struct file *filp)
 	int ret;
 	long pm_qos_class;
 
+	lock_kernel();
 	pm_qos_class = find_pm_qos_object_by_minor(iminor(inode));
 	if (pm_qos_class >= 0) {
 		filp->private_data = (void *)pm_qos_class;
 		sprintf(name, "process_%d", current->pid);
 		ret = pm_qos_add_requirement(pm_qos_class, name,
 					PM_QOS_DEFAULT_VALUE);
-		if (ret >= 0)
+		if (ret >= 0) {
+			unlock_kernel();
 			return 0;
+		}
 	}
+	unlock_kernel();
 
 	return -EPERM;
 }