[media] s5p-mfc: end-of-stream handling in encoder bug fix

In some circumstances after issuing the V4L2_ENC_CMD_STOP the application
could freeze. This patch prevents this behavior.

Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/platform/s5p-mfc/s5p_mfc_enc.c

@@ -1534,6 +1534,8 @@ int vidioc_encoder_cmd(struct file *file, void *priv,
 		if (list_empty(&ctx->src_queue)) {
 			mfc_debug(2, "EOS: empty src queue, entering finishing state");
 			ctx->state = MFCINST_FINISHING;
+			if (s5p_mfc_ctx_ready(ctx))
+				set_work_bit_irqsave(ctx);
 			spin_unlock_irqrestore(&dev->irqlock, flags);
 			s5p_mfc_hw_call(dev->mfc_ops, try_run, dev);
 		} else {