From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757099AbXD0S7Q (ORCPT ); Fri, 27 Apr 2007 14:59:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757020AbXD0S6r (ORCPT ); Fri, 27 Apr 2007 14:58:47 -0400 Received: from cantor2.suse.de ([195.135.220.15]:35278 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757052AbXD0S54 (ORCPT ); Fri, 27 Apr 2007 14:57:56 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , Ben Collins , Stefan Richter , linux1394-devel Subject: [PATCH 27/46] IEEE1394: remove rwsem use from ieee1394 core Date: Fri, 27 Apr 2007 11:53:41 -0700 Message-Id: <117770013729-git-send-email-gregkh@suse.de> X-Mailer: git-send-email 1.5.1.2 In-Reply-To: <11777001333852-git-send-email-gregkh@suse.de> References: <20070427185152.GA17121@kroah.com> <1177700040520-git-send-email-gregkh@suse.de> <11777000433552-git-send-email-gregkh@suse.de> <11777000471977-git-send-email-gregkh@suse.de> <11777000511784-git-send-email-gregkh@suse.de> <11777000552084-git-send-email-gregkh@suse.de> <1177700059319-git-send-email-gregkh@suse.de> <11777000632194-git-send-email-gregkh@suse.de> <11777000663361-git-send-email-gregkh@suse.de> <1177700070961-git-send-email-gregkh@suse.de> <1177700074272-git-send-email-gregkh@suse.de> <11777000773819-git-send-email-gregkh@suse.de> <11777000814075-git-send-email-gregkh@suse.de> <11777000852694-git-send-email-gregkh@suse.de> <11777000881307-git-send-email-gregkh@suse.de> <11777000923797-git-send-email-gregkh@suse.de> <11777000963332-git-send-email-gregkh@suse.de> <11777001002860-git-send-email-gregkh@suse.de> <11777001041847-git-send-email-gregkh@suse.de> <11777001072576-git-send-email-gregkh@suse.de> <11777001102852-git-send-email-gregkh@suse.de> <1177700114535-git-send-email-gregkh@suse.de> <11777001182501-git-send-email-gregkh@suse.de> <11777001222882-git-send-email-gregkh@suse.de> <1177700125350-git-send-email-gregkh@suse.de> <11777001301175-git-send-email-gregkh@suse.de> <11777001333852-git-send-email-gregkh@suse.de> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org The subsystem rwsem is not used by the driver core at all, so the use of it in the ieee1394 code doesn't make any sense. They might possibly want to use a local lock, but as most of these operations are already protected by a local lock, it really doesn't look like it would be needed. Cc: Ben Collins Cc: Stefan Richter Cc: linux1394-devel Signed-off-by: Greg Kroah-Hartman --- drivers/ieee1394/nodemgr.c | 8 -------- 1 files changed, 0 insertions(+), 8 deletions(-) diff --git a/drivers/ieee1394/nodemgr.c b/drivers/ieee1394/nodemgr.c index 1644e6f..dbeba45 100644 --- a/drivers/ieee1394/nodemgr.c +++ b/drivers/ieee1394/nodemgr.c @@ -370,9 +370,7 @@ static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute if (state == 1) { ud->ignore_driver = 1; - down_write(&ieee1394_bus_type.subsys.rwsem); device_release_driver(dev); - up_write(&ieee1394_bus_type.subsys.rwsem); } else if (state == 0) ud->ignore_driver = 0; @@ -1391,12 +1389,10 @@ static void nodemgr_suspend_ne(struct node_entry *ne) if (ud->ne != ne) continue; - down_write(&ieee1394_bus_type.subsys.rwsem); if (ud->device.driver && (!ud->device.driver->suspend || ud->device.driver->suspend(&ud->device, PMSG_SUSPEND))) device_release_driver(&ud->device); - up_write(&ieee1394_bus_type.subsys.rwsem); } up(&nodemgr_ud_class.sem); } @@ -1416,10 +1412,8 @@ static void nodemgr_resume_ne(struct node_entry *ne) if (ud->ne != ne) continue; - down_read(&ieee1394_bus_type.subsys.rwsem); if (ud->device.driver && ud->device.driver->resume) ud->device.driver->resume(&ud->device); - up_read(&ieee1394_bus_type.subsys.rwsem); } up(&nodemgr_ud_class.sem); @@ -1440,7 +1434,6 @@ static void nodemgr_update_pdrv(struct node_entry *ne) if (ud->ne != ne) continue; - down_write(&ieee1394_bus_type.subsys.rwsem); if (ud->device.driver) { pdrv = container_of(ud->device.driver, struct hpsb_protocol_driver, @@ -1448,7 +1441,6 @@ static void nodemgr_update_pdrv(struct node_entry *ne) if (pdrv->update && pdrv->update(ud)) device_release_driver(&ud->device); } - up_write(&ieee1394_bus_type.subsys.rwsem); } up(&nodemgr_ud_class.sem); } -- 1.5.1.2