msm: kgsl: Changing to kref_get_unless_zero for process refcount



Do not allow anything to get a refcount to the process_private
structure if its refcount has gone down to 0.

Change-Id: I7cd6f731286aebfc84c288284599b47f666dcd47
Signed-off-by: Shrenuj Bansal <shrenujb@codeaurora.org>

parent 155357d0

drivers/gpu/msm/kgsl.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -830,7 +830,8 @@ kgsl_find_process_private(struct kgsl_device_private *cur_dev_priv)
		mutex_lock(&kgsl_driver.process_mutex);
		list_for_each_entry(private, &kgsl_driver.process_list, list) {
		if (private->pid == task_tgid_nr(current)) {
		kref_get(&private->refcount);
		if (!kref_get_unless_zero(&private->refcount))
		private = NULL;
		goto done;
		}
		}