Date: Fri, 02 Mar 2012 12:38:44 -0800 From: Sean Bruno <seanbru@yahoo-inc.com> To: hackers@freebsd.org Subject: [patch] Disable bios probe if acpi is enabled Message-ID: <1330720724.5391.2.camel@powernoodle-l7.corp.yahoo.com>
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[-- Attachment #1 --]
I'm noting that newer machines are completely hosed if we attempt to
probe for bios values. I'm proposing this change.
-bash-4.2$ p4 diff -du //depot/yahoo/ybsd_7/src/sys/i386/i386/bios.c
--- //depot/yahoo/ybsd_7/src/sys/i386/i386/bios.c 2011-09-16
22:47:30.000000000 0000
+++ /home/seanbru/ybsd_7/src/sys/i386/i386/bios.c 2011-09-16
22:47:30.000000000 0000
@@ -84,6 +84,12 @@
char *p;
/*
+ * Don't do bios probing if acpi is enabled, its
+ * pointless and breaks on newer systems
+ */
+ if (!resource_disabled("acpi", 0))
+ return;
+ /*
* BIOS32 Service Directory, PCI BIOS
*/
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