From owner-svn-src-stable@freebsd.org Tue Dec 25 07:33:03 2018 Return-Path: Delivered-To: svn-src-stable@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 3C1361344C14; Tue, 25 Dec 2018 07:33:03 +0000 (UTC) (envelope-from arybchik@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id D6A828EE1D; Tue, 25 Dec 2018 07:33:02 +0000 (UTC) (envelope-from arybchik@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 C7F5E90C7; Tue, 25 Dec 2018 07:33:02 +0000 (UTC) (envelope-from arybchik@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id wBP7X2GU052265; Tue, 25 Dec 2018 07:33:02 GMT (envelope-from arybchik@FreeBSD.org) Received: (from arybchik@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id wBP7X2HR052264; Tue, 25 Dec 2018 07:33:02 GMT (envelope-from arybchik@FreeBSD.org) Message-Id: <201812250733.wBP7X2HR052264@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: arybchik set sender to arybchik@FreeBSD.org using -f From: Andrew Rybchenko Date: Tue, 25 Dec 2018 07:33:02 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r342450 - stable/11/sys/dev/sfxge/common X-SVN-Group: stable-11 X-SVN-Commit-Author: arybchik X-SVN-Commit-Paths: stable/11/sys/dev/sfxge/common X-SVN-Commit-Revision: 342450 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: D6A828EE1D X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.97 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.998,0]; NEURAL_HAM_SHORT(-0.97)[-0.973,0]; NEURAL_HAM_LONG(-1.00)[-0.998,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US] X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 25 Dec 2018 07:33:03 -0000 Author: arybchik Date: Tue Dec 25 07:33:02 2018 New Revision: 342450 URL: https://svnweb.freebsd.org/changeset/base/342450 Log: MFC r341326 sfxge(4): ensure EvQ poll stops when abort is requested If an event handler requested an abort, only the inner loop was guarenteed to be broken out of - the outer loop could continue if total == batch. Fix this by poisoning batch to ensure it is different to total. Submitted by: Mark Spender Sponsored by: Solarflare Communications, Inc. Differential Revision: https://reviews.freebsd.org/D18287 Modified: stable/11/sys/dev/sfxge/common/efx_ev.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/dev/sfxge/common/efx_ev.c ============================================================================== --- stable/11/sys/dev/sfxge/common/efx_ev.c Tue Dec 25 07:32:18 2018 (r342449) +++ stable/11/sys/dev/sfxge/common/efx_ev.c Tue Dec 25 07:33:02 2018 (r342450) @@ -501,6 +501,14 @@ efx_ev_qpoll( if (should_abort) { /* Ignore subsequent events */ total = index + 1; + + /* + * Poison batch to ensure the outer + * loop is broken out of. + */ + EFSYS_ASSERT(batch <= EFX_EV_BATCH); + batch += (EFX_EV_BATCH << 1); + EFSYS_ASSERT(total != batch); break; } }