Date: Mon, 16 Sep 2013 15:10:11 +0000 (UTC) From: Nathan Whitehorn <nwhitehorn@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r255615 - head/sys/powerpc/ofw Message-ID: <201309161510.r8GFABav024780@svn.freebsd.org>
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Author: nwhitehorn Date: Mon Sep 16 15:10:11 2013 New Revision: 255615 URL: http://svnweb.freebsd.org/changeset/base/255615 Log: Add a loader tunable to use only device tree-provided PCI devices. This is needed on some more fragile systems to avoid machine checks when blindly probing the PCI bus. Also reduce ofw_pcibus's priority slightly so that it can be overridden. Approved by: re (gjb) Modified: head/sys/powerpc/ofw/ofw_pcibus.c Modified: head/sys/powerpc/ofw/ofw_pcibus.c ============================================================================== --- head/sys/powerpc/ofw/ofw_pcibus.c Mon Sep 16 14:32:56 2013 (r255614) +++ head/sys/powerpc/ofw/ofw_pcibus.c Mon Sep 16 15:10:11 2013 (r255615) @@ -101,6 +101,9 @@ DRIVER_MODULE(ofw_pcibus, pcib, ofw_pcib MODULE_VERSION(ofw_pcibus, 1); MODULE_DEPEND(ofw_pcibus, pci, 1, 1, 1); +static int ofw_devices_only = 0; +TUNABLE_INT("hw.pci.ofw_devices_only", &ofw_devices_only); + static int ofw_pcibus_probe(device_t dev) { @@ -109,7 +112,7 @@ ofw_pcibus_probe(device_t dev) return (ENXIO); device_set_desc(dev, "OFW PCI bus"); - return (0); + return (BUS_PROBE_DEFAULT); } static int @@ -137,7 +140,8 @@ ofw_pcibus_attach(device_t dev) * functions on multi-function cards. */ - ofw_pcibus_enum_bus(dev, domain, busno); + if (!ofw_devices_only) + ofw_pcibus_enum_bus(dev, domain, busno); return (bus_generic_attach(dev)); }
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