As pointed out by Jonathan Corbet, the timer must be deleted before

flushing the work queue in order to avoid a job being submitted after the
chip had been released.
Signed-off-by: NRajiv Andrade <srajiv@linux.vnet.ibm.com>
Signed-off-by: NMimi Zohar <zohar@linux.vnet.ibm.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: "Serge E. Hallyn" <serue@us.ibm.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NJames Morris <jmorris@namei.org>

drivers/char/tpm/tpm.c

@@ -1004,9 +1004,9 @@ int tpm_release(struct inode *inode, struct file *file)
 {
 	struct tpm_chip *chip = file->private_data;
 
+	del_singleshot_timer_sync(&chip->user_read_timer);
 	flush_scheduled_work();
 	file->private_data = NULL;
-	del_singleshot_timer_sync(&chip->user_read_timer);
 	atomic_set(&chip->data_pending, 0);
 	kfree(chip->data_buffer);
 	clear_bit(0, &chip->is_open);