Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754244AbbDZOHb (ORCPT ); Sun, 26 Apr 2015 10:07:31 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:40972 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753466AbbDZOD5 (ORCPT ); Sun, 26 Apr 2015 10:03:57 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Seth Jennings , Mauro Carvalho Chehab , Vinson Lee Subject: [PATCH 3.14 40/42] sb_edac: avoid INTERNAL ERROR message in EDAC with unspecified channel Date: Sun, 26 Apr 2015 16:01:59 +0200 Message-Id: <20150426134249.905837267@linuxfoundation.org> X-Mailer: git-send-email 2.3.6 In-Reply-To: <20150426134248.160161895@linuxfoundation.org> References: <20150426134248.160161895@linuxfoundation.org> User-Agent: quilt/0.64 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 Content-Length: 2423 Lines: 63 3.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Seth Jennings commit 351fc4a99d49fde63fe5ab7412beb35c40d27269 upstream. Intel IA32 SDM Table 15-14 defines channel 0xf as 'not specified', but EDAC doesn't know about this and returns and INTERNAL ERROR when the channel is greater than NUM_CHANNELS: kernel: [ 1538.886456] CPU 0: Machine Check Exception: 0 Bank 1: 940000000000009f kernel: [ 1538.886669] TSC 2bc68b22e7e812 ADDR 46dae7000 MISC 0 PROCESSOR 0:306e4 TIME 1390414572 SOCKET 0 APIC 0 kernel: [ 1538.971948] EDAC MC1: INTERNAL ERROR: channel value is out of range (15 >= 4) kernel: [ 1538.972203] EDAC MC1: 0 CE memory read error on unknown memory (slot:0 page:0x46dae7 offset:0x0 grain:0 syndrome:0x0 - area:DRAM err_code:0000:009f socket:1 channel_mask:1 rank:0) This commit changes sb_edac to forward a channel of -1 to EDAC if the channel is not specified. edac_mc_handle_error() sets the channel to -1 internally after the error message anyway, so this commit should have no effect other than avoiding the INTERNAL ERROR message when the channel is not specified. Signed-off-by: Seth Jennings Signed-off-by: Mauro Carvalho Chehab Cc: Vinson Lee Signed-off-by: Greg Kroah-Hartman --- drivers/edac/sb_edac.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) --- a/drivers/edac/sb_edac.c +++ b/drivers/edac/sb_edac.c @@ -285,8 +285,9 @@ static const u32 correrrthrsld[] = { * sbridge structs */ -#define NUM_CHANNELS 4 -#define MAX_DIMMS 3 /* Max DIMMS per channel */ +#define NUM_CHANNELS 4 +#define MAX_DIMMS 3 /* Max DIMMS per channel */ +#define CHANNEL_UNSPECIFIED 0xf /* Intel IA32 SDM 15-14 */ enum type { SANDY_BRIDGE, @@ -1750,6 +1751,9 @@ static void sbridge_mce_output_error(str /* FIXME: need support for channel mask */ + if (channel == CHANNEL_UNSPECIFIED) + channel = -1; + /* Call the helper to output message */ edac_mc_handle_error(tp_event, mci, core_err_cnt, m->addr >> PAGE_SHIFT, m->addr & ~PAGE_MASK, 0, -- 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/