svn commit: r366110 - head/sys/arm64/arm64

[Andrew Turner]

Author: andrew
Date: Thu Sep 24 10:40:49 2020
New Revision: 366110
URL: https://svnweb.freebsd.org/changeset/base/366110

Log:
  Ensure arm64 DMA alignment is passed from parents to children
  
  This ensures the alignment check will take these alignments into account.
  
  Sponsored by:	Innovate UK

Modified:
  head/sys/arm64/arm64/busdma_machdep.c

Modified: head/sys/arm64/arm64/busdma_machdep.c
==============================================================================
--- head/sys/arm64/arm64/busdma_machdep.c	Thu Sep 24 09:06:04 2020	(r366109)
+++ head/sys/arm64/arm64/busdma_machdep.c	Thu Sep 24 10:40:49 2020	(r366110)
@@ -167,6 +167,7 @@ common_bus_dma_tag_create(struct bus_dma_tag_common *p
 		common->impl = parent->impl;
 		common->lowaddr = MIN(parent->lowaddr, common->lowaddr);
 		common->highaddr = MAX(parent->highaddr, common->highaddr);
+		common->alignment = MAX(parent->alignment, common->alignment);
 		if (common->boundary == 0)
 			common->boundary = parent->boundary;
 		else if (parent->boundary != 0) {