From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:35418 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751165AbdH0HsG (ORCPT ); Sun, 27 Aug 2017 03:48:06 -0400 Subject: Patch "ARCv2: SLC: Make sure busy bit is set properly for region ops" has been added to the 4.12-stable tree To: abrodkin@synopsys.com, gregkh@linuxfoundation.org, vgupta@synopsys.com Cc: , From: Date: Sun, 27 Aug 2017 09:47:52 +0200 Message-ID: <150382007217819@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 ARCv2: SLC: Make sure busy bit is set properly for region ops to the 4.12-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: arcv2-slc-make-sure-busy-bit-is-set-properly-for-region-ops.patch and it can be found in the queue-4.12 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From b37174d95b0251611a80ef60abf03752e9d66d67 Mon Sep 17 00:00:00 2001 From: Alexey Brodkin Date: Fri, 7 Jul 2017 12:25:14 +0300 Subject: ARCv2: SLC: Make sure busy bit is set properly for region ops From: Alexey Brodkin commit b37174d95b0251611a80ef60abf03752e9d66d67 upstream. c70c473396cb "ARCv2: SLC: Make sure busy bit is set properly on SLC flushing" fixes problem for entire SLC operation where the problem was initially caught. But given a nature of the issue it is perfectly possible for busy bit to be read incorrectly even when region operation was started. So extending initial fix for regional operation as well. Signed-off-by: Alexey Brodkin Signed-off-by: Vineet Gupta Signed-off-by: Greg Kroah-Hartman --- arch/arc/mm/cache.c | 3 +++ 1 file changed, 3 insertions(+) --- a/arch/arc/mm/cache.c +++ b/arch/arc/mm/cache.c @@ -697,6 +697,9 @@ noinline void slc_op(phys_addr_t paddr, write_aux_reg(ARC_REG_SLC_RGN_END, (paddr + sz + l2_line_sz - 1)); write_aux_reg(ARC_REG_SLC_RGN_START, paddr); + /* Make sure "busy" bit reports correct stataus, see STAR 9001165532 */ + read_aux_reg(ARC_REG_SLC_CTRL); + while (read_aux_reg(ARC_REG_SLC_CTRL) & SLC_CTRL_BUSY); spin_unlock_irqrestore(&lock, flags); Patches currently in stable-queue which might be from abrodkin@synopsys.com are queue-4.12/arcv2-slc-make-sure-busy-bit-is-set-properly-for-region-ops.patch queue-4.12/arcv2-pae40-explicitly-set-msb-counterpart-of-slc-region-ops-addresses.patch