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authorLen Brown <len.brown@intel.com>2008-01-23 20:50:56 -0500
committerLen Brown <len.brown@intel.com>2008-01-23 21:26:15 -0500
commitd4b7dc499daae909e62dc260b95cd618f2970ded (patch)
treed24816be9d0830724e35f322c515dc8db38d4a2e /drivers/acpi/blacklist.c
parent7ce95ce5c6dbbc3f70933f04537860ffd9dbe17e (diff)
downloadlinux-d4b7dc499daae909e62dc260b95cd618f2970ded.tar.bz2
ACPI: make _OSI(Linux) console messages smarter
If BIOS invokes _OSI(Linux), the kernel response depends on what the ACPI DMI list knows about the system, and that is reflectd in dmesg: 1) System unknown to DMI: ACPI: BIOS _OSI(Linux) query ignored ACPI: DMI System Vendor: LENOVO ACPI: DMI Product Name: 7661W1P ACPI: DMI Product Version: ThinkPad T61 ACPI: DMI Board Name: 7661W1P ACPI: DMI BIOS Vendor: LENOVO ACPI: DMI BIOS Date: 10/18/2007 ACPI: Please send DMI info above to linux-acpi@vger.kernel.org ACPI: If "acpi_osi=Linux" works better, please notify linux-acpi@vger.kernel.org 2) System known to DMI, but effect of OSI(Linux) unknown: ACPI: DMI detected: Lenovo ThinkPad T61 ... ACPI: BIOS _OSI(Linux) query ignored via DMI ACPI: If "acpi_osi=Linux" works better, please notify linux-acpi@vger.kernel.org 3) System known to DMI, which disables _OSI(Linux): ACPI: DMI detected: Lenovo ThinkPad T61 ... ACPI: BIOS _OSI(Linux) query ignored via DMI 4) System known to DMI, which enable _OSI(Linux): ACPI: DMI detected: Lenovo ThinkPad T61 ACPI: Added _OSI(Linux) ... ACPI: BIOS _OSI(Linux) query honored via DMI cmdline overrides take precidence over the built-in default and the DMI prescribed default. cmdline "acpi_osi=Linux" results in: ACPI: BIOS _OSI(Linux) query honored via cmdline Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/blacklist.c')
-rw-r--r--drivers/acpi/blacklist.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/acpi/blacklist.c b/drivers/acpi/blacklist.c
index 3ec110ce00c8..018fc16c44ce 100644
--- a/drivers/acpi/blacklist.c
+++ b/drivers/acpi/blacklist.c
@@ -3,6 +3,7 @@
*
* Check to see if the given machine has a known bad ACPI BIOS
* or if the BIOS is too old.
+ * Check given machine against acpi_osi_dmi_table[].
*
* Copyright (C) 2004 Len Brown <len.brown@intel.com>
* Copyright (C) 2002 Andy Grover <andrew.grover@intel.com>
@@ -50,6 +51,8 @@ struct acpi_blacklist_item {
u32 is_critical_error;
};
+static struct dmi_system_id acpi_osi_dmi_table[] __initdata;
+
/*
* POLICY: If *anything* doesn't work, put it on the blacklist.
* If they are critical errors, mark it critical, and abort driver load.
@@ -165,5 +168,13 @@ int __init acpi_blacklisted(void)
blacklisted += blacklist_by_year();
+ dmi_check_system(acpi_osi_dmi_table);
+
return blacklisted;
}
+#ifdef CONFIG_DMI
+static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
+ {}
+};
+
+#endif /* CONFIG_DMI */