From: Andreas Herrmann Date: Mon, 17 May 2010 16:43:24 +0000 (+0200) Subject: x86, hpet: Add reference to chipset erratum documentation for disable-hpet-msi-quirk X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=fec84e330719c20d2146c8dbdc9ff50b3a1d7039;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git 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 LKML-Reference: <20100517164324.GB10254@alberich.amd.com> Signed-off-by: H. Peter Anvin --- 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