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| author | Joerg Roedel <joerg.roedel@amd.com> | 2010-06-01 11:57:49 +0400 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2010-06-01 11:57:49 +0400 |
| commit | 1d61e73ab4c7470833241af888939a7aab2b0354 (patch) | |
| tree | dd714c2428070a7ea2bf807c2821ac75ff13ec55 /arch/x86/kernel/quirks.c | |
| parent | 84fe6c19e4a598e8071e3bd1b2c923454eae1268 (diff) | |
| parent | 67a3e12b05e055c0415c556a315a3d3eb637e29e (diff) | |
| download | linux-1d61e73ab4c7470833241af888939a7aab2b0354.tar.xz | |
Merge commit 'v2.6.35-rc1' into amd-iommu/2.6.35
Diffstat (limited to 'arch/x86/kernel/quirks.c')
| -rw-r--r-- | arch/x86/kernel/quirks.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/kernel/quirks.c b/arch/x86/kernel/quirks.c index 12e9feaa2f7a..e72d3fc6547d 100644 --- a/arch/x86/kernel/quirks.c +++ b/arch/x86/kernel/quirks.c @@ -495,10 +495,18 @@ 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 + * delayed. See hpet_next_event() for details. */ static void force_disable_hpet_msi(struct pci_dev *unused) { hpet_msi_disable = 1; + hpet_readback_cmp = 1; } DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_SBX00_SMBUS, |