[PATCH] tpm: fix timer initialization

Fix the timer to be inited and modified properly.  This work depends on the
fixing of the msleep stuff which in patch 1 of this set.

Signed-of-by: Kylene Hall <kjhall@us.ibm.com>

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 6 insertions, 20 deletions

diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c
index 2035c15..f7fa3c3 100644
--- a/drivers/char/tpm/tpm.c
+++ b/drivers/char/tpm/tpm.c
@@ -434,16 +434,7 @@ int tpm_release(struct inode *inode, struct file *file)
 
 	spin_lock(&driver_lock);
 	chip->num_opens--;
-	spin_unlock(&driver_lock);
-
-	down(&chip->timer_manipulation_mutex);
-	if (timer_pending(&chip->user_read_timer))
-		del_singleshot_timer_sync(&chip->user_read_timer);
-	else if (timer_pending(&chip->device_timer))
-		del_singleshot_timer_sync(&chip->device_timer);
-	up(&chip->timer_manipulation_mutex);
-
-	kfree(chip->data_buffer);
+	del_singleshot_timer_sync(&chip->user_read_timer);
 	atomic_set(&chip->data_pending, 0);
 
 	pci_dev_put(chip->pci_dev);
@@ -481,13 +472,7 @@ ssize_t tpm_write(struct file * file, const char __user * buf,
 	up(&chip->buffer_mutex);
 
 	/* Set a timeout by which the reader must come claim the result */
-	down(&chip->timer_manipulation_mutex);
-	init_timer(&chip->user_read_timer);
-	chip->user_read_timer.function = user_reader_timeout;
-	chip->user_read_timer.data = (unsigned long) chip;
-	chip->user_read_timer.expires = jiffies + (60 * HZ);
-	add_timer(&chip->user_read_timer);
-	up(&chip->timer_manipulation_mutex);
+	mod_timer(&chip->user_read_timer, jiffies + (60 * HZ));
 
 	return in_size;
 }
@@ -617,9 +602,12 @@ int tpm_register_hardware(struct pci_dev *pci_dev,
 
 	init_MUTEX(&chip->buffer_mutex);
 	init_MUTEX(&chip->tpm_mutex);
-	init_MUTEX(&chip->timer_manipulation_mutex);
 	INIT_LIST_HEAD(&chip->list);
 
+	init_timer(&chip->user_read_timer);
+	chip->user_read_timer.function = user_reader_timeout;
+	chip->user_read_timer.data = (unsigned long) chip;
+
 	chip->vendor = entry;
 
 	chip->dev_num = -1;
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 1a94a8c..3a5af7e 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -63,8 +63,6 @@ struct tpm_chip {
 
 	struct timer_list user_read_timer;	/* user needs to claim result */
 	struct semaphore tpm_mutex;	/* tpm is processing */
-	struct timer_list device_timer;	/* tpm is processing */
-	struct semaphore timer_manipulation_mutex;
 
 	struct tpm_vendor_specific *vendor;