Date: Tue, 28 May 2013 18:43:58 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org Subject: svn commit: r251064 - stable/8/sys/dev/cpufreq Message-ID: <201305281843.r4SIhwr8094512@svn.freebsd.org>
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Author: jhb Date: Tue May 28 18:43:58 2013 New Revision: 251064 URL: http://svnweb.freebsd.org/changeset/base/251064 Log: MFC 247332: Add a quirk to disable this driver for certain older laptops with an ICH2 southbridge and an Intel 82815_MC host bridge where the host bridge's revision is less than 5 Modified: stable/8/sys/dev/cpufreq/ichss.c Directory Properties: stable/8/sys/ (props changed) stable/8/sys/dev/ (props changed) stable/8/sys/dev/cpufreq/ (props changed) Modified: stable/8/sys/dev/cpufreq/ichss.c ============================================================================== --- stable/8/sys/dev/cpufreq/ichss.c Tue May 28 18:13:08 2013 (r251063) +++ stable/8/sys/dev/cpufreq/ichss.c Tue May 28 18:43:58 2013 (r251064) @@ -67,7 +67,7 @@ struct ichss_softc { #define PCI_DEV_82801BA 0x244c /* ICH2M */ #define PCI_DEV_82801CA 0x248c /* ICH3M */ #define PCI_DEV_82801DB 0x24cc /* ICH4M */ -#define PCI_DEV_82815BA 0x1130 /* Unsupported/buggy part */ +#define PCI_DEV_82815_MC 0x1130 /* Unsupported/buggy part */ /* PCI config registers for finding PMBASE and enabling SpeedStep. */ #define ICHSS_PMBASE_OFFSET 0x40 @@ -155,9 +155,6 @@ ichss_identify(driver_t *driver, device_ * E.g. see Section 6.1 "PCI Devices and Functions" and table 6.1 of * Intel(r) 82801BA I/O Controller Hub 2 (ICH2) and Intel(r) 82801BAM * I/O Controller Hub 2 Mobile (ICH2-M). - * - * TODO: add a quirk to disable if we see the 82815_MC along - * with the 82801BA and revision < 5. */ ich_device = pci_find_bsf(0, 0x1f, 0); if (ich_device == NULL || @@ -167,6 +164,22 @@ ichss_identify(driver_t *driver, device_ pci_get_device(ich_device) != PCI_DEV_82801DB)) return; + /* + * Certain systems with ICH2 and an Intel 82815_MC host bridge + * where the host bridge's revision is < 5 lockup if SpeedStep + * is used. + */ + if (pci_get_device(ich_device) == PCI_DEV_82801BA) { + device_t hostb; + + hostb = pci_find_bsf(0, 0, 0); + if (hostb != NULL && + pci_get_vendor(hostb) == PCI_VENDOR_INTEL && + pci_get_device(hostb) == PCI_DEV_82815_MC && + pci_get_revid(hostb) < 5) + return; + } + /* Find the PMBASE register from our PCI config header. */ pmbase = pci_read_config(ich_device, ICHSS_PMBASE_OFFSET, sizeof(pmbase));
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