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ibm_rtl: _RTL_ is not available in UEFI mode

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Some of the IBM servers that are supported by ibm_rtl
can run in both Legacy mode (BIOS) and in UEFI mode.
When running in UEFI mode, it is possible that the
EBDA table exists but cannot be mapped and reports
errors.  We need to make sure that by default we don't
try to probe the machines if they are running in UEFI
mode.

Signed-off-by: Vernon Mauery <vernux@us.ibm.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
This commit is contained in:
Vernon Mauery 2010-11-02 13:08:11 -07:00 committed by Matthew Garrett
parent a2262260f9
commit 1d37db77c1
1 changed files with 2 additions and 1 deletions
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3
drivers/platform/x86/ibm_rtl.c
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@ -28,6 +28,7 @@
#include <linux/io.h>
#include <linux/sysdev.h>
#include <linux/dmi.h>
#include <linux/efi.h>
#include <linux/mutex.h>
#include <asm/bios_ebda.h>
@ -238,7 +239,7 @@ static int __init ibm_rtl_init(void) {
if (force)
pr_warning("ibm-rtl: module loaded by force\n");
/* first ensure that we are running on IBM HW */
else if (!dmi_check_system(ibm_rtl_dmi_table))
else if (efi_enabled || !dmi_check_system(ibm_rtl_dmi_table))
return -ENODEV;
/* Get the address for the Extended BIOS Data Area */