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SubjectDell Studio 1536 needs pci=nocrs to boot.
Some machines don't boot unless passed pci=nocrs.
(See https://bugzilla.redhat.com/show_bug.cgi?id=770308 for details of
one report. Waiting on dmidecode output for others).

Currently there is a DMI whitelist, even though the default is on.

This patch extends that dmi list to add a blacklist to automatically
apply disable it when necessary.

Signed-off-by: Dave Jones <davej@redhat.com>

diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
index 404f21a..2704a9c 100644
--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -24,6 +24,12 @@ static int __init set_use_crs(const struct dmi_system_id *id)
return 0;
}

+static int __init set_nouse_crs(const struct dmi_system_id *id)
+{
+ pci_use_crs = false;
+ return 0;
+}
+
static const struct dmi_system_id pci_use_crs_table[] __initconst = {
/* http://bugzilla.kernel.org/show_bug.cgi?id=14183 */
{
@@ -54,6 +60,18 @@ static const struct dmi_system_id pci_use_crs_table[] __initconst = {
DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
},
},
+
+ /* Now for the blacklist.. */
+
+ /* https://bugzilla.redhat.com/show_bug.cgi?id=770308 */
+ {
+ .callback = set_nouse_crs,
+ .ident = "Dell Studio 1536",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_BOARD_NAME, "0M273C"),
+ },
+ },
{}
};


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