Author: emaste
Date: Tue Feb 28 17:29:31 2012
New Revision: 232260
URL: http://svn.freebsd.org/changeset/base/232260
Log:
Avoid transfers crossing a 4GB boundary, which can lead to data
corruption. Thanks to scottl@ for the suggestion.
This change will likely be revised after consideration of a general
method to address this type of issue for other drivers.
Sponsored by: Sandvine Incorporated
MFC after: 3 days
Modified:
head/sys/dev/aac/aac_pci.c
Modified: head/sys/dev/aac/aac_pci.c
==============================================================================
--- head/sys/dev/aac/aac_pci.c Tue Feb 28 15:52:01 2012 (r232259)
+++ head/sys/dev/aac/aac_pci.c Tue Feb 28 17:29:31 2012 (r232260)
@@ -403,7 +403,8 @@ aac_pci_attach(device_t dev)
* Note that some of these controllers are 64-bit capable.
*/
if (bus_dma_tag_create(NULL, /* parent */
- PAGE_SIZE, 0, /* algnmnt, boundary */
+ PAGE_SIZE, /* alignment */
+ ((bus_size_t)((uint64_t)1 << 32)), /* boundary*/
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
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