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PR/43274 CVS commit: src/sys/arch/sparc64/dev
The following reply was made to PR kern/43274; it has been noted by GNATS.
From: matthew green <mrg%netbsd.org@localhost>
Subject: PR/43274 CVS commit: src/sys/arch/sparc64/dev
Date: Thu, 17 Jun 2010 06:48:46 +0000
Module Name: src
Committed By: mrg
Date: Thu Jun 17 06:48:46 UTC 2010
in iommu_remove() don't invalidate the IOMMU mapping. for reasons not
yet determined, some PCI devices (at least fxp(4) and re(4)) sometimes
appear to perform DMA operations while this is happening, and we get
uncorrectable DMA errors. ideally, this "shouldn't happen", but none
of the investigation so far has reveal the problem, and my source
investigation of both opensolaris and linux show that their perform
the invaliation when unmapping.
"handles" PR#43274 as well as other issues...
XXX: candidate for netbsd-5
To generate a diff of this commit:
cvs rdiff -u -r1.98 -r1.99 src/sys/arch/sparc64/dev/iommu.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
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