Date: Sat, 5 May 2007 09:18:05 +0000 (UTC) From: Ariff Abdullah <ariff@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/dev/sound/pci ich.c Message-ID: <200705050918.l459I5rY048855@repoman.freebsd.org>
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ariff 2007-05-05 09:18:05 UTC
FreeBSD src repository
Modified files:
sys/dev/sound/pci ich.c
Log:
Fix (or rather workaround) Intel 440MX Errata #36
- http://www.intel.com/design/chipsets/specupdt/245051.htm
AC97 Soft Audio and Soft Modem Master Abort Errata
Issue:
Use of either soft audio or soft modem on an Intel® 82443MX PCISet
based platform running a 100 MHz Processor System Bus and an AC97 codec
may result in failures. The system continues to function normally while
the AC97 hardware may not resume and may require a cold-boot to
recover. As a result of the failure, the Master Abort Status bit will
be set in the audio or modem function PCI header space.
Workaround:
Force uncacheable DMA on both BDL and pcm buffers.
Tested by: Emil Holmstr|m <emil@linux.se>
Revision Changes Path
1.75 +116 -58 src/sys/dev/sound/pci/ich.c
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