Patch-ID# 101013-01
Keywords: kmem_free panic DMA 4MB transfer DDI_DMA_PARTIAL scsi HBA driver disk 256K
Synopsis: SunOS 5.1:  system can panic on sun4m when doing DMA transfers
Date: Sep/02/93

Solaris Release: 2.1

SunOS release: 5.1

Unbundled Product: 

Unbundled Release: 

Topic: Solaris 2.1:  fixes to kernel/drv/iommu

BugId's fixed with this patch: 1125743

Changes incorporated in this version: 

Relevant Architectures ('arch -k' values if kernel specific): sun4m

Other patches which conflict with this patch: 

This patch obsoleted by: 

Files included with this patch: 
	kernel/drv/iommu

Problem Description: 

(from 101013-01)
The system will panic on sun4m when doing DMA transfers larger than
256K with the DDI_DMA_PARTIAL flag set in ddi_dma_setup. This will
affect disk transfers as the esp/ncr scsi HBA driver uses this flag
when setting up DMA resources. 256K and larger transfers without the
DDI_DMA_PARTIAL flag work.


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