Merge "msm: kgsl: Fix race between kgsl device open and close"

	int result = 0;

	mutex_lock(&device->mutex);

	device->open_count--;

	if (device->open_count == 0)

	if (device->open_count == 1)

		result = device->ftbl->last_close(device);

	/*

	 * We must decrement the open_count after last_close() has finished.

	 * This is because last_close() relinquishes device mutex while

	 * waiting for active count to become 0. This opens up a window

	 * where a new process can come in, see that open_count is 0, and

	 * initiate a first_open(). This can potentially mess up the power

	 * state machine. To avoid a first_open() from happening before

	 * last_close() has finished, decrement the open_count after

	 * last_close().

	 */

	device->open_count--;

	mutex_unlock(&device->mutex);

	return result;