--- zzzz-none-000/linux-3.10.107/drivers/media/pci/ivtv/ivtv-udma.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/media/pci/ivtv/ivtv-udma.c	2021-02-04 17:41:59.000000000 +0000
@@ -76,7 +76,7 @@
 	int i;
 	struct scatterlist *sg;
 
-	for (i = 0, sg = dma->SGlist; i < dma->SG_length; i++, sg++) {
+	for (i = 0, sg = dma->SGlist; i < dma->SG_length; i++, sg = sg_next(sg)) {
 		dma->SGarray[i].size = cpu_to_le32(sg_dma_len(sg));
 		dma->SGarray[i].src = cpu_to_le32(sg_dma_address(sg));
 		dma->SGarray[i].dst = cpu_to_le32(buffer_offset);
@@ -124,10 +124,8 @@
 	}
 
 	/* Get user pages for DMA Xfer */
-	down_read(&current->mm->mmap_sem);
-	err = get_user_pages(current, current->mm,
-			user_dma.uaddr, user_dma.page_count, 0, 1, dma->map, NULL);
-	up_read(&current->mm->mmap_sem);
+	err = get_user_pages_unlocked(current, current->mm,
+			user_dma.uaddr, user_dma.page_count, 0, 1, dma->map);
 
 	if (user_dma.page_count != err) {
 		IVTV_DEBUG_WARN("failed to map user pages, returned %d instead of %d\n",