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Commit fec84e33 authored by Andreas Herrmann's avatar Andreas Herrmann Committed by H. Peter Anvin
Browse files

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: default avatarAndreas Herrmann <andreas.herrmann3@amd.com>
LKML-Reference: <20100517164324.GB10254@alberich.amd.com>
Signed-off-by: default avatarH. Peter Anvin <hpa@zytor.com>
parent 30a564be

arch/x86/kernel/quirks.c

+3 −0
Original line number Diff line number Diff line
@@ -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