[PATCH v12 08/16] platform/x86: dell-smbios: only run if proper oem string is detected

From: Mario Limonciello
Date: Wed Nov 01 2017 - 15:26:10 EST


The proper way to indicate that a system is a 'supported' Dell System
is by the presence of this string in OEM strings.

Allowing the driver to load on non-Dell systems will have undefined
results.

Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxxx>
Reviewed-by: Edward O'Callaghan <quasisec@xxxxxxxxxx>
---
drivers/platform/x86/dell-smbios.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/drivers/platform/x86/dell-smbios.c b/drivers/platform/x86/dell-smbios.c
index ffc174638aa4..12a3eb153911 100644
--- a/drivers/platform/x86/dell-smbios.c
+++ b/drivers/platform/x86/dell-smbios.c
@@ -172,8 +172,15 @@ static void __init find_tokens(const struct dmi_header *dm, void *dummy)

static int __init dell_smbios_init(void)
{
+ const struct dmi_device *valid;
int ret;

+ valid = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, "Dell System", NULL);
+ if (!valid) {
+ pr_err("Unable to run on non-Dell system\n");
+ return -ENODEV;
+ }
+
dmi_walk(find_tokens, NULL);

if (!da_tokens) {
--
2.14.1