From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:35904 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753783AbcCGUyW (ORCPT ); Mon, 7 Mar 2016 15:54:22 -0500 Subject: Patch "cxl: Fix PSL timebase synchronization detection" has been added to the 4.4-stable tree To: fbarrat@linux.vnet.ibm.com, andrew.donnellan@au1.ibm.com, gregkh@linuxfoundation.org, imunsie@au1.ibm.com, mikey@neuling.org, mpe@ellerman.id.au, mrochs@linux.vnet.ibm.com, vaibhav@linux.vnet.ibm.com Cc: , From: Date: Mon, 07 Mar 2016 12:54:21 -0800 Message-ID: <1457384061108193@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled cxl: Fix PSL timebase synchronization detection to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: cxl-fix-psl-timebase-synchronization-detection.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 923adb1646d5ba739d2a1e63ee20d60574d9da8e Mon Sep 17 00:00:00 2001 From: Frederic Barrat Date: Wed, 24 Feb 2016 18:27:51 +0100 Subject: cxl: Fix PSL timebase synchronization detection From: Frederic Barrat commit 923adb1646d5ba739d2a1e63ee20d60574d9da8e upstream. The PSL timebase synchronization is seemingly failing for configuration not including VIRT_CPU_ACCOUNTING_NATIVE. The driver shows the following trace in dmesg: PSL: Timebase sync: giving up! The PSL timebase register is actually syncing correctly, but the cxl driver is not detecting it. Fix is to use the proper timebase-to-time conversion. Signed-off-by: Frederic Barrat Acked-by: Michael Neuling Reviewed-by: Matthew R. Ochs Acked-by: Ian Munsie Reviewed-by: Andrew Donnellan Reviewed-by: Vaibhav Jain Signed-off-by: Michael Ellerman Signed-off-by: Greg Kroah-Hartman --- drivers/misc/cxl/pci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/misc/cxl/pci.c +++ b/drivers/misc/cxl/pci.c @@ -414,7 +414,7 @@ static int cxl_setup_psl_timebase(struct delta = mftb() - psl_tb; if (delta < 0) delta = -delta; - } while (cputime_to_usecs(delta) > 16); + } while (tb_to_ns(delta) > 16000); return 0; } Patches currently in stable-queue which might be from fbarrat@linux.vnet.ibm.com are queue-4.4/cxl-fix-psl-timebase-synchronization-detection.patch