From owner-svn-src-all@freebsd.org Tue Feb 28 05:24:08 2017 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 0C668CF1685; Tue, 28 Feb 2017 05:24:08 +0000 (UTC) (envelope-from mav@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id B0A0C32D; Tue, 28 Feb 2017 05:24:07 +0000 (UTC) (envelope-from mav@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id v1S5O6hJ064774; Tue, 28 Feb 2017 05:24:06 GMT (envelope-from mav@FreeBSD.org) Received: (from mav@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id v1S5O6N0064773; Tue, 28 Feb 2017 05:24:06 GMT (envelope-from mav@FreeBSD.org) Message-Id: <201702280524.v1S5O6N0064773@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: mav set sender to mav@FreeBSD.org using -f From: Alexander Motin Date: Tue, 28 Feb 2017 05:24:06 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r314375 - head/sys/dev/firewire X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 28 Feb 2017 05:24:08 -0000 Author: mav Date: Tue Feb 28 05:24:06 2017 New Revision: 314375 URL: https://svnweb.freebsd.org/changeset/base/314375 Log: Remove some locking not needed for modern CAM. This driver is full of LORs. This change allows to reduce deadlock chance from 100% to level that allows some tests to be done. MFC after: 2 weeks Modified: head/sys/dev/firewire/sbp_targ.c Modified: head/sys/dev/firewire/sbp_targ.c ============================================================================== --- head/sys/dev/firewire/sbp_targ.c Tue Feb 28 05:17:50 2017 (r314374) +++ head/sys/dev/firewire/sbp_targ.c Tue Feb 28 05:24:06 2017 (r314375) @@ -317,10 +317,8 @@ sbp_targ_post_busreset(void *arg) unit = &sc->unit; if ((sc->flags & F_FREEZED) == 0) { - SBP_LOCK(sc); sc->flags |= F_FREEZED; xpt_freeze_simq(sc->sim, /*count*/1); - SBP_UNLOCK(sc); } else { printf("%s: already freezed\n", __func__); } @@ -367,10 +365,8 @@ sbp_targ_post_explore(void *arg) struct sbp_targ_softc *sc; sc = (struct sbp_targ_softc *)arg; - SBP_LOCK(sc); sc->flags &= ~F_FREEZED; xpt_release_simq(sc->sim, /*run queue*/TRUE); - SBP_UNLOCK(sc); return; } @@ -869,18 +865,14 @@ sbp_targ_cam_done(struct fw_xfer *xfer) printf("%s: CAM_SEND_STATUS not set %0x\n", __func__, ccb->ccb_h.flags); ccb->ccb_h.status = CAM_REQ_CMP; } - SBP_LOCK(orbi->sc); xpt_done(ccb); - SBP_UNLOCK(orbi->sc); } else { orbi->status.len = 1; sbp_targ_status_FIFO(orbi, orbi->login->fifo_hi, orbi->login->fifo_lo, /*dequeue*/1); ccb->ccb_h.status = CAM_REQ_ABORTED; - SBP_LOCK(orbi->sc); xpt_done(ccb); - SBP_UNLOCK(orbi->sc); } } @@ -1456,9 +1448,7 @@ sbp_targ_cmd_handler(struct fw_xfer *xfe sbp_targ_remove_orb_info(orbi->login, orbi); free(orbi, M_SBP_TARG); atio->ccb_h.status = CAM_REQ_ABORTED; - SBP_LOCK(orbi->sc); xpt_done((union ccb*)atio); - SBP_UNLOCK(orbi->sc); goto done0; } orbi->state = ORBI_STATUS_ATIO; @@ -1530,9 +1520,7 @@ sbp_targ_cmd_handler(struct fw_xfer *xfe orbi->data_lo = orb[3]; orbi->orb4 = *orb4; - SBP_LOCK(orbi->sc); xpt_done((union ccb*)atio); - SBP_UNLOCK(orbi->sc); done0: fw_xfer_free(xfer); return; @@ -2023,8 +2011,8 @@ sbp_targ_detach(device_t dev) SBP_LOCK(sc); xpt_free_path(sc->path); xpt_bus_deregister(cam_sim_path(sc->sim)); - SBP_UNLOCK(sc); cam_sim_free(sc->sim, /*free_devq*/TRUE); + SBP_UNLOCK(sc); for (i = 0; i < MAX_LUN; i++) { lstate = sc->lstate[i];