From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:60374 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753745AbdBDJRQ (ORCPT ); Sat, 4 Feb 2017 04:17:16 -0500 Subject: Patch "pinctrl: baytrail: Add missing spinlock usage in byt_gpio_irq_handler" has been added to the 4.9-stable tree To: alexander.stein@systec-electronic.com, gregkh@linuxfoundation.org, linus.walleij@linaro.org, mika.westerberg@linux.intel.com Cc: , From: Date: Sat, 04 Feb 2017 10:16:50 +0100 Message-ID: <148619981039159@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 pinctrl: baytrail: Add missing spinlock usage in byt_gpio_irq_handler to the 4.9-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: pinctrl-baytrail-add-missing-spinlock-usage-in-byt_gpio_irq_handler.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From cdca06e4e85974d8a3503ab15709dbbaf90d3dd1 Mon Sep 17 00:00:00 2001 From: Alexander Stein Date: Mon, 30 Jan 2017 12:35:28 +0100 Subject: pinctrl: baytrail: Add missing spinlock usage in byt_gpio_irq_handler From: Alexander Stein commit cdca06e4e85974d8a3503ab15709dbbaf90d3dd1 upstream. According to VLI64 Intel Atom E3800 Specification Update (#329901) concurrent read accesses may result in returning 0xffffffff and write accesses may be dropped silently. To workaround all accesses must be protected by locks. Signed-off-by: Alexander Stein Acked-by: Mika Westerberg Signed-off-by: Linus Walleij Signed-off-by: Greg Kroah-Hartman --- drivers/pinctrl/intel/pinctrl-baytrail.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/pinctrl/intel/pinctrl-baytrail.c +++ b/drivers/pinctrl/intel/pinctrl-baytrail.c @@ -1612,7 +1612,9 @@ static void byt_gpio_irq_handler(struct continue; } + raw_spin_lock(&vg->lock); pending = readl(reg); + raw_spin_unlock(&vg->lock); for_each_set_bit(pin, &pending, 32) { virq = irq_find_mapping(vg->chip.irqdomain, base + pin); generic_handle_irq(virq); Patches currently in stable-queue which might be from alexander.stein@systec-electronic.com are queue-4.9/pinctrl-baytrail-add-missing-spinlock-usage-in-byt_gpio_irq_handler.patch