adreno_ringbuffer_waitspace(struct adreno_ringbuffer *rb, unsigned int numcmds,
			  int wptr_ahead)
{

if ((rb->wptr + numcmds) > (rb->sizedwords -
				GSL_RB_NOP_SIZEDWORDS))
			adreno_ringbuffer_waitspace(rb, numcmds, 1);
	} else {
		/* wptr behind rptr */
		if ((rb->wptr + numcmds) >= rb->rptr)
			adreno_ringbuffer_waitspace(rb, numcmds, 0);
		/* check for remaining space */
		/* reserve dwords for nop packet */
		if ((rb->wptr + numcmds) > (rb->sizedwords -
				GSL_RB_NOP_SIZEDWORDS))
			adreno_ringbuffer_waitspace(rb, numcmds, 1);