diff mbox

[5/5] efi_rtc: probe function error out in case no efi runtime enabled

Message ID 1407823822-23829-5-git-send-email-dyoung@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Dave Young Aug. 12, 2014, 6:10 a.m. UTC
efi rtc depends on efi runtime services, so if efi runtime services are not
usable it should error out.

Without this patch rtc-efi will panic with 'noefi' boot

Signed-off-by: Dave Young <dyoung@redhat.com>
---
 drivers/rtc/rtc-efi.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox

Patch

diff --git a/drivers/rtc/rtc-efi.c b/drivers/rtc/rtc-efi.c
index 8225b89..8c02ed8 100644
--- a/drivers/rtc/rtc-efi.c
+++ b/drivers/rtc/rtc-efi.c
@@ -213,6 +213,9 @@  static int __init efi_rtc_probe(struct platform_device *dev)
 {
 	struct rtc_device *rtc;
 
+	if (!efi_enabled(EFI_RUNTIME_SERVICES))
+		return -ENODEV;
+
 	rtc = devm_rtc_device_register(&dev->dev, "rtc-efi", &efi_rtc_ops,
 					THIS_MODULE);
 	if (IS_ERR(rtc))