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firmware: dmi_scan: Add DMI_OEM_STRING support to dmi_matches 

OEM strings are defined by each OEM and they contain customized and
useful OEM information. Supporting it provides more flexible uses of
the dmi_matches function.

Signed-off-by: Alex Hung <alex.hung@canonical.com>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
This commit is contained in:
Alex Hung 2018-04-13 15:37:59 +02:00 committed by Jean Delvare
parent 90fe6f8ff0
commit de40614de9
2 changed files with 10 additions and 1 deletions
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10
drivers/firmware/dmi_scan.c
View File

@ -775,7 +775,15 @@ static bool dmi_matches(const struct dmi_system_id *dmi)
int s = dmi->matches[i].slot;
if (s == DMI_NONE)
break;
if (dmi_ident[s]) {
if (s == DMI_OEM_STRING) {
/* DMI_OEM_STRING must be exact match */
const struct dmi_device *valid;
valid = dmi_find_device(DMI_DEV_TYPE_OEM_STRING,
dmi->matches[i].substr, NULL);
if (valid)
continue;
} else if (dmi_ident[s]) {
if (dmi->matches[i].exact_match) {
if (!strcmp(dmi_ident[s],
dmi->matches[i].substr))

1
include/linux/mod_devicetable.h
View File

@ -502,6 +502,7 @@ enum dmi_field {
DMI_CHASSIS_SERIAL,
DMI_CHASSIS_ASSET_TAG,
DMI_STRING_MAX,
DMI_OEM_STRING, /* special case - will not be in dmi_ident */
};
struct dmi_strmatch {