From owner-svn-src-head@freebsd.org Tue May 1 14:59:39 2018 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 8C3D0FAD88B; Tue, 1 May 2018 14:59:39 +0000 (UTC) (envelope-from np@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 2F0617986C; Tue, 1 May 2018 14:59:39 +0000 (UTC) (envelope-from np@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 mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 1DD822387A; Tue, 1 May 2018 14:59:39 +0000 (UTC) (envelope-from np@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w41Exc47064926; Tue, 1 May 2018 14:59:38 GMT (envelope-from np@FreeBSD.org) Received: (from np@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w41ExcaF064925; Tue, 1 May 2018 14:59:38 GMT (envelope-from np@FreeBSD.org) Message-Id: <201805011459.w41ExcaF064925@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: np set sender to np@FreeBSD.org using -f From: Navdeep Parhar Date: Tue, 1 May 2018 14:59:38 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r333139 - head/sys/dev/cxgbe X-SVN-Group: head X-SVN-Commit-Author: np X-SVN-Commit-Paths: head/sys/dev/cxgbe X-SVN-Commit-Revision: 333139 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 01 May 2018 14:59:39 -0000 Author: np Date: Tue May 1 14:59:38 2018 New Revision: 333139 URL: https://svnweb.freebsd.org/changeset/base/333139 Log: cxgbe(4): Destroy the cdev before disabling interrupts in driver detach. Filter work requests are submitted in the nexus cdev's ioctl which then blocks waiting for a reply. If driver detach runs in this state and disables interrupts the ioctl will never complete and detach will hang in destroy_cdev. Sponsored by: Chelsio Communications Modified: head/sys/dev/cxgbe/t4_main.c Modified: head/sys/dev/cxgbe/t4_main.c ============================================================================== --- head/sys/dev/cxgbe/t4_main.c Tue May 1 13:57:08 2018 (r333138) +++ head/sys/dev/cxgbe/t4_main.c Tue May 1 14:59:38 2018 (r333139) @@ -1317,15 +1317,15 @@ t4_detach_common(device_t dev) sc = device_get_softc(dev); + if (sc->cdev) { + destroy_dev(sc->cdev); + sc->cdev = NULL; + } + sc->flags &= ~CHK_MBOX_ACCESS; if (sc->flags & FULL_INIT_DONE) { if (!(sc->flags & IS_VF)) t4_intr_disable(sc); - } - - if (sc->cdev) { - destroy_dev(sc->cdev); - sc->cdev = NULL; } if (device_is_attached(dev)) {