[media] s5p-mfc: Allocate firmware with internal private buffer alloc function

Once firmware buffer has been converted to use s5p_mfc_priv_buf structure,
it is possible to allocate it with existing s5p_mfc_alloc_priv_buf()
function. This change will help to reduce code variants in the next
patches.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Acked-by: Andrzej Hajda <a.hajda@samsung.com>
Tested-by: Smitha T Murthy <smitha.t@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/platform/s5p-mfc/s5p_mfc_ctrl.c

@@ -27,6 +27,7 @@
 int s5p_mfc_alloc_firmware(struct s5p_mfc_dev *dev)
 {
 	struct s5p_mfc_priv_buf *fw_buf = &dev->fw_buf;
+	int err;
 
 	fw_buf->size = dev->variant->buf_size->fw;
 
@@ -35,11 +36,10 @@ int s5p_mfc_alloc_firmware(struct s5p_mfc_dev *dev)
 		return -ENOMEM;
 	}
 
-	fw_buf->virt = dma_alloc_coherent(dev->mem_dev[BANK1_CTX], fw_buf->size,
-					 &fw_buf->dma, GFP_KERNEL);
-	if (!fw_buf->virt) {
+	err = s5p_mfc_alloc_priv_buf(dev, BANK1_CTX, &dev->fw_buf);
+	if (err) {
 		mfc_err("Allocating bitprocessor buffer failed\n");
-		return -ENOMEM;
+		return err;
 	}
 
 	return 0;
@@ -92,11 +92,7 @@ int s5p_mfc_release_firmware(struct s5p_mfc_dev *dev)
 {
 	/* Before calling this function one has to make sure
 	 * that MFC is no longer processing */
-	if (!dev->fw_buf.virt)
-		return -EINVAL;
-	dma_free_coherent(dev->mem_dev[BANK1_CTX], dev->fw_buf.size,
-			  dev->fw_buf.virt, dev->fw_buf.dma);
-	dev->fw_buf.virt = NULL;
+	s5p_mfc_release_priv_buf(dev, &dev->fw_buf);
 	return 0;
 }