svn commit: r269215 - head/sys/arm/arm

[Ian Lepore]

Author: ian
Date: Tue Jul 29 02:37:31 2014
New Revision: 269215
URL: http://svnweb.freebsd.org/changeset/base/269215

Log:
  We never need bounce pages for memory we allocate.  We cleverly allocate
  memory the matches all the constraints of the dma tag so that bouncing
  will never be required.
  
  Reviewed by:	cognet

Modified:
  head/sys/arm/arm/busdma_machdep-v6.c

Modified: head/sys/arm/arm/busdma_machdep-v6.c
==============================================================================
--- head/sys/arm/arm/busdma_machdep-v6.c	Tue Jul 29 02:37:24 2014	(r269214)
+++ head/sys/arm/arm/busdma_machdep-v6.c	Tue Jul 29 02:37:31 2014	(r269215)
@@ -743,14 +743,6 @@ bus_dmamem_alloc(bus_dma_tag_t dmat, voi
 	map->flags = DMAMAP_DMAMEM_ALLOC;
 	map->sync_count = 0;
 
-	/* We may need bounce pages, even for allocated memory */
-	error = allocate_bz_and_pages(dmat, map);
-	if (error != 0) {
-		free(map, M_DEVBUF);
-		*mapp = NULL;
-		return (error);
-	}
-
 	if (dmat->segments == NULL) {
 		dmat->segments = (bus_dma_segment_t *)malloc(
 		    sizeof(bus_dma_segment_t) * dmat->nsegments, M_DEVBUF,