dma-buf/sw_sync: put fence reference from the fence creation

Once sw_sync_ioctl_create_fence() returns we no longer have the
*pt pointer to the fence base object thus we need to put the reference
we have from the fence creation to keep a correct reference accounting.

Signed-off-by: Gustavo Padovan <[e-mail]>
Reviewed-by: Chris Wilson <[e-mail]>
Signed-off-by: Sumit Semwal <[e-mail]>
Link: http://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/dma-buf/sw_sync.c

···
 	}
 
 	sync_file = sync_file_create(&pt->base);
+	dma_fence_put(&pt->base);
 	if (!sync_file) {
-		dma_fence_put(&pt->base);
 		err = -ENOMEM;
 		goto err;
 	}