Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932674AbaKLB3D (ORCPT ); Tue, 11 Nov 2014 20:29:03 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:59122 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932653AbaKLB26 (ORCPT ); Tue, 11 Nov 2014 20:28:58 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Mark Salter , Dave Young , Alessandro Zummo , Matt Fleming Subject: [PATCH 3.17 177/319] rtc: Disable EFI rtc for x86 Date: Wed, 12 Nov 2014 10:15:15 +0900 Message-Id: <20141112011021.992179503@linuxfoundation.org> X-Mailer: git-send-email 2.1.3 In-Reply-To: <20141112010952.553519040@linuxfoundation.org> References: <20141112010952.553519040@linuxfoundation.org> User-Agent: quilt/0.63-1 MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.17-stable review patch. If anyone has any objections, please let me know. ------------------ From: Matt Fleming commit 7efe665903d0d963b0ebf4cab25cc3ae32c62600 upstream. commit da167ad7638759 ("rtc: ia64: allow other architectures to use EFI RTC") inadvertently introduced a regression for x86 because we've been careful not to enable the EFI rtc driver due to the generally buggy implementations of the time-related EFI runtime services. In fact, since the above commit was merged we've seen reports of crashes on 32-bit tablets, https://bugzilla.kernel.org/show_bug.cgi?id=84241#c21 Disable it explicitly for x86 so that we don't give users false hope that this driver will work - it won't, and your machine is likely to crash. Acked-by: Mark Salter Cc: Dave Young Cc: Alessandro Zummo Signed-off-by: Matt Fleming Signed-off-by: Greg Kroah-Hartman --- drivers/rtc/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -806,7 +806,7 @@ config RTC_DRV_DA9063 config RTC_DRV_EFI tristate "EFI RTC" - depends on EFI + depends on EFI && !X86 help If you say yes here you will get support for the EFI Real Time Clock. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/