Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753907AbdLHKI7 (ORCPT ); Fri, 8 Dec 2017 05:08:59 -0500 Received: from szxga05-in.huawei.com ([45.249.212.191]:2269 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753030AbdLHJgp (ORCPT ); Fri, 8 Dec 2017 04:36:45 -0500 From: Jason Yan To: , CC: , , , , , , , , , , , , Jason Yan , Ewan Milne , Tomas Henzl Subject: [PATCH v5 5/7] scsi: libsas: use flush_workqueue to process disco events synchronously Date: Fri, 8 Dec 2017 17:42:08 +0800 Message-ID: <20171208094210.24887-6-yanaijie@huawei.com> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20171208094210.24887-1-yanaijie@huawei.com> References: <20171208094210.24887-1-yanaijie@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.175.124.28] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1391 Lines: 41 Now we are processing sas event and discover event in different workqueues. It's safe to wait the discover event done in the sas event work. Use flush_workqueue() to insure the disco and revalidate events processed synchronously so that the whole discover and revalidate process will not be interrupted by other events. Signed-off-by: Jason Yan CC: John Garry CC: Johannes Thumshirn CC: Ewan Milne CC: Christoph Hellwig CC: Tomas Henzl CC: Dan Williams --- drivers/scsi/libsas/sas_port.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/scsi/libsas/sas_port.c b/drivers/scsi/libsas/sas_port.c index 9326628..64722f4 100644 --- a/drivers/scsi/libsas/sas_port.c +++ b/drivers/scsi/libsas/sas_port.c @@ -192,6 +192,7 @@ static void sas_form_port(struct asd_sas_phy *phy) si->dft->lldd_port_formed(phy); sas_discover_event(phy->port, DISCE_DISCOVER_DOMAIN); + flush_workqueue(sas_ha->disco_q); } /** @@ -277,6 +278,9 @@ void sas_porte_broadcast_rcvd(struct work_struct *work) SAS_DPRINTK("broadcast received: %d\n", prim); sas_discover_event(phy->port, DISCE_REVALIDATE_DOMAIN); + + if (phy->port) + flush_workqueue(phy->port->ha->disco_q); } void sas_porte_link_reset_err(struct work_struct *work) -- 2.9.5