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authorAndreas Herrmann <andreas.herrmann3@amd.com>2010-05-17 18:43:24 +0200
committerH. Peter Anvin <hpa@zytor.com>2010-05-17 10:04:43 -0700
commitfec84e330719c20d2146c8dbdc9ff50b3a1d7039 (patch)
tree0d12887db371a334dbeef3250e0f645a4af643a1 /arch/x86
parent30a564be9d9554c168a654eddc2165869cc0d7bf (diff)
x86, hpet: Add reference to chipset erratum documentation for disable-hpet-msi-quirk
(At the moment the "SB700 Family Product Errata" document is available at http://support.amd.com/us/Embedded_TechDocs/46837.pdf) Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com> LKML-Reference: <20100517164324.GB10254@alberich.amd.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/kernel/quirks.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kernel/quirks.c b/arch/x86/kernel/quirks.c
index cd2c336c8d09..e72d3fc6547d 100644
--- a/arch/x86/kernel/quirks.c
+++ b/arch/x86/kernel/quirks.c
@@ -495,6 +495,9 @@ void force_hpet_resume(void)
/*
* HPET MSI on some boards (ATI SB700/SB800) has side effect on
* floppy DMA. Disable HPET MSI on such platforms.
+ * See erratum #27 (Misinterpreted MSI Requests May Result in
+ * Corrupted LPC DMA Data) in AMD Publication #46837,
+ * "SB700 Family Product Errata", Rev. 1.0, March 2010.
*
* Also force the read back of the CMP register in hpet_next_event()
* to work around the problem that the CMP register write seems to be