512 	struct osst_buffer * STbuffer;  in osst_write_behind_check()  local
514 	STbuffer = STp->buffer;  in osst_write_behind_check()
535 	if (STbuffer->writing < STbuffer->buffer_bytes)  in osst_write_behind_check()
538 	STbuffer->last_SRpnt = NULL;  in osst_write_behind_check()
539 	STbuffer->buffer_bytes -= STbuffer->writing;  in osst_write_behind_check()
540 	STbuffer->writing = 0;  in osst_write_behind_check()
5331 static int enlarge_buffer(struct osst_buffer *STbuffer, int need_dma)  in enlarge_buffer()  argument
5336 	if (STbuffer->buffer_size >= OS_FRAME_SIZE)  in enlarge_buffer()
5339 	if (STbuffer->sg_segs) {  in enlarge_buffer()
5341 		normalize_buffer(STbuffer);  in enlarge_buffer()
5344 	nbr = max_segs = STbuffer->use_sg;  in enlarge_buffer()
5357 		STbuffer->sg[0].offset = 0;  in enlarge_buffer()
5359 		    sg_set_page(&STbuffer->sg[0], page, b_size, 0);  in enlarge_buffer()
5360 		    STbuffer->b_data = page_address(page);  in enlarge_buffer()
5364 	if (sg_page(&STbuffer->sg[0]) == NULL) {  in enlarge_buffer()
5369 	for (segs=STbuffer->sg_segs=1, got=b_size;  in enlarge_buffer()
5372 		STbuffer->sg[segs].offset = 0;  in enlarge_buffer()
5377 			STbuffer->buffer_size = got;  in enlarge_buffer()
5379 			normalize_buffer(STbuffer);  in enlarge_buffer()
5382 …sg_set_page(&STbuffer->sg[segs], page, (OS_FRAME_SIZE - got <= PAGE_SIZE / 2) ? (OS_FRAME_SIZE - g…  in enlarge_buffer()
5383 		got += STbuffer->sg[segs].length;  in enlarge_buffer()
5384 		STbuffer->buffer_size = got;  in enlarge_buffer()
5385 		STbuffer->sg_segs = ++segs;  in enlarge_buffer()
5391 			   got, STbuffer->orig_sg_segs, STbuffer->sg_segs, need_dma, STbuffer->b_data);  in enlarge_buffer()
5394 			   STbuffer->sg[0].length, page_address(STbuffer->sg[0].page),  in enlarge_buffer()
5395 			   STbuffer->sg[segs-1].length, page_address(STbuffer->sg[segs-1].page));  in enlarge_buffer()
5404 static void normalize_buffer(struct osst_buffer *STbuffer)  in normalize_buffer()  argument
5408 	for (i=0; i < STbuffer->sg_segs; i++) {  in normalize_buffer()
5411 		     b_size < STbuffer->sg[i].length;  in normalize_buffer()
5414 		__free_pages(sg_page(&STbuffer->sg[i]), order);  in normalize_buffer()
5415 		STbuffer->buffer_size -= STbuffer->sg[i].length;  in normalize_buffer()
5418 	if (debugging && STbuffer->orig_sg_segs < STbuffer->sg_segs)  in normalize_buffer()
5420 			     STbuffer->b_data, STbuffer->buffer_size, STbuffer->sg_segs);  in normalize_buffer()
5422 	STbuffer->sg_segs = STbuffer->orig_sg_segs = 0;  in normalize_buffer()