From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 956ABC10F11 for ; Wed, 24 Apr 2019 17:39:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6383C20675 for ; Wed, 24 Apr 2019 17:39:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1556127583; bh=ODyhJmbxpgUJ145tAlfCi8sB6HYJBxFgx8TPVbHkWa8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=aneaHgtvKIHpvzRJNWg7wY4dFxx8g8UT9cBjHx4WqU0hqxKm6IILkyi7LlapSmBee rp5S4FWGhHhlPZVVqiqDgFvH0+59TqIckZV32URR62ADouE/CVnh0oA+88/CvTVDz7 lDXjmAB7lWvVaC4ZnCD0xcGaQ7PndmklWckvrxJ8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392012AbfDXRhw (ORCPT ); Wed, 24 Apr 2019 13:37:52 -0400 Received: from mail.kernel.org ([198.145.29.99]:36826 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2392264AbfDXRhr (ORCPT ); Wed, 24 Apr 2019 13:37:47 -0400 Received: from localhost (62-193-50-229.as16211.net [62.193.50.229]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 6D8C32054F; Wed, 24 Apr 2019 17:37:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1556127465; bh=ODyhJmbxpgUJ145tAlfCi8sB6HYJBxFgx8TPVbHkWa8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Mh65q8I0+YP0ttAmgXBM533onXP2dMwbmnVMlK8YRV4tdgjKqarjBpJECw8sqHRsN 1YqOmeHhU+fKSE1V+8NpkaauSM9qXwDombjeMy9Yiu1aQFZn31ltEAG61N67DRSmcw oC+b9gPLMjCHHpZ7q4RGUWxnL98cmyDl6nrthYdQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Toshi Kani , Dan Williams , Sasha Levin Subject: [PATCH 5.0 101/115] nfit/ars: Introduce scrub_flags Date: Wed, 24 Apr 2019 19:10:37 +0200 Message-Id: <20190424170930.666255693@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190424170924.797924502@linuxfoundation.org> References: <20190424170924.797924502@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org commit e34b8252a3d2893ca55c82dbfcdaa302fa03d400 upstream. In preparation for introducing new flags to gate whether ARS results are stale, or poll the completion state, convert the existing flags to an unsigned long with enumerated values. This conversion allows the flags to be atomically updated outside of ->init_mutex. Reviewed-by: Toshi Kani Signed-off-by: Dan Williams Signed-off-by: Sasha Levin --- drivers/acpi/nfit/core.c | 30 +++++++++++++++++------------- drivers/acpi/nfit/nfit.h | 8 ++++++-- 2 files changed, 23 insertions(+), 15 deletions(-) diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c index 1a48c92eaed5..64308e669250 100644 --- a/drivers/acpi/nfit/core.c +++ b/drivers/acpi/nfit/core.c @@ -1319,19 +1319,23 @@ static ssize_t scrub_show(struct device *dev, struct device_attribute *attr, char *buf) { struct nvdimm_bus_descriptor *nd_desc; + struct acpi_nfit_desc *acpi_desc; ssize_t rc = -ENXIO; + bool busy; device_lock(dev); nd_desc = dev_get_drvdata(dev); - if (nd_desc) { - struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc); - - mutex_lock(&acpi_desc->init_mutex); - rc = sprintf(buf, "%d%s", acpi_desc->scrub_count, - acpi_desc->scrub_busy - && !acpi_desc->cancel ? "+\n" : "\n"); - mutex_unlock(&acpi_desc->init_mutex); + if (!nd_desc) { + device_unlock(dev); + return rc; } + acpi_desc = to_acpi_desc(nd_desc); + + mutex_lock(&acpi_desc->init_mutex); + busy = test_bit(ARS_BUSY, &acpi_desc->scrub_flags) + && !test_bit(ARS_CANCEL, &acpi_desc->scrub_flags); + rc = sprintf(buf, "%d%s", acpi_desc->scrub_count, busy ? "+\n" : "\n"); + mutex_unlock(&acpi_desc->init_mutex); device_unlock(dev); return rc; } @@ -3081,7 +3085,7 @@ static unsigned int __acpi_nfit_scrub(struct acpi_nfit_desc *acpi_desc, lockdep_assert_held(&acpi_desc->init_mutex); - if (acpi_desc->cancel) + if (test_bit(ARS_CANCEL, &acpi_desc->scrub_flags)) return 0; if (query_rc == -EBUSY) { @@ -3155,7 +3159,7 @@ static void __sched_ars(struct acpi_nfit_desc *acpi_desc, unsigned int tmo) { lockdep_assert_held(&acpi_desc->init_mutex); - acpi_desc->scrub_busy = 1; + set_bit(ARS_BUSY, &acpi_desc->scrub_flags); /* note this should only be set from within the workqueue */ if (tmo) acpi_desc->scrub_tmo = tmo; @@ -3171,7 +3175,7 @@ static void notify_ars_done(struct acpi_nfit_desc *acpi_desc) { lockdep_assert_held(&acpi_desc->init_mutex); - acpi_desc->scrub_busy = 0; + clear_bit(ARS_BUSY, &acpi_desc->scrub_flags); acpi_desc->scrub_count++; if (acpi_desc->scrub_count_state) sysfs_notify_dirent(acpi_desc->scrub_count_state); @@ -3460,7 +3464,7 @@ int acpi_nfit_ars_rescan(struct acpi_nfit_desc *acpi_desc, struct nfit_spa *nfit_spa; mutex_lock(&acpi_desc->init_mutex); - if (acpi_desc->cancel) { + if (test_bit(ARS_CANCEL, &acpi_desc->scrub_flags)) { mutex_unlock(&acpi_desc->init_mutex); return 0; } @@ -3539,7 +3543,7 @@ void acpi_nfit_shutdown(void *data) mutex_unlock(&acpi_desc_lock); mutex_lock(&acpi_desc->init_mutex); - acpi_desc->cancel = 1; + set_bit(ARS_CANCEL, &acpi_desc->scrub_flags); cancel_delayed_work_sync(&acpi_desc->dwork); mutex_unlock(&acpi_desc->init_mutex); diff --git a/drivers/acpi/nfit/nfit.h b/drivers/acpi/nfit/nfit.h index 871fb3de3b30..897ce10192a0 100644 --- a/drivers/acpi/nfit/nfit.h +++ b/drivers/acpi/nfit/nfit.h @@ -210,6 +210,11 @@ struct nfit_mem { int family; }; +enum scrub_flags { + ARS_BUSY, + ARS_CANCEL, +}; + struct acpi_nfit_desc { struct nvdimm_bus_descriptor nd_desc; struct acpi_table_header acpi_header; @@ -231,8 +236,7 @@ struct acpi_nfit_desc { unsigned int max_ars; unsigned int scrub_count; unsigned int scrub_mode; - unsigned int scrub_busy:1; - unsigned int cancel:1; + unsigned long scrub_flags; unsigned long dimm_cmd_force_en; unsigned long bus_cmd_force_en; unsigned long bus_nfit_cmd_force_en; -- 2.19.1