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Commit 5b27b176 authored by Anthony Godshall, Ampro Computers, Inc's avatar Anthony Godshall, Ampro Computers, Inc Committed by Len Brown
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ACPI: make blacklist more verbose 



IMHO, ACPI disabled due to DMI failure or blacklisted year should be noted,
as is done with other ACPI blacklisting.

This will help people troubleshoot when ACPI isn't working.  Status quo is
a mysterious "ACPI Disabled" message without explanation on BIOS that
implements ACPI but not DMI.  This is actually fairly common on embedded
x86 boards.

Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent f110ef58

drivers/acpi/blacklist.c

+8 −2
Original line number Diff line number Diff line
@@ -79,11 +79,17 @@ static int __init blacklist_by_year(void) 
{

	int year = dmi_get_year(DMI_BIOS_DATE);

	/* Doesn't exist? Likely an old system */

	if (year == -1)

	if (year == -1) {

		printk(KERN_ERR PREFIX "no DMI BIOS year, "

			"acpi=force is required to enable ACPI\n" );

		return 1;

	}

	/* 0? Likely a buggy new BIOS */

	if (year == 0)

	if (year == 0) {

		printk(KERN_ERR PREFIX "DMI BIOS year==0, "

			"assuming ACPI-capable machine\n" );

		return 0;

	}

	if (year < CONFIG_ACPI_BLACKLIST_YEAR) {

		printk(KERN_ERR PREFIX "BIOS age (%d) fails cutoff (%d), "

		       "acpi=force is required to enable ACPI\n",