From owner-svn-src-stable@FreeBSD.ORG Mon Sep 27 17:50:58 2010 Return-Path: Delivered-To: svn-src-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id D097C106566B; Mon, 27 Sep 2010 17:50:58 +0000 (UTC) (envelope-from yongari@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c]) by mx1.freebsd.org (Postfix) with ESMTP id BF1738FC0A; Mon, 27 Sep 2010 17:50:58 +0000 (UTC) Received: from svn.freebsd.org (localhost [127.0.0.1]) by svn.freebsd.org (8.14.3/8.14.3) with ESMTP id o8RHoweq044707; Mon, 27 Sep 2010 17:50:58 GMT (envelope-from yongari@svn.freebsd.org) Received: (from yongari@localhost) by svn.freebsd.org (8.14.3/8.14.3/Submit) id o8RHowWv044705; Mon, 27 Sep 2010 17:50:58 GMT (envelope-from yongari@svn.freebsd.org) Message-Id: <201009271750.o8RHowWv044705@svn.freebsd.org> From: Pyun YongHyeon Date: Mon, 27 Sep 2010 17:50:58 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org X-SVN-Group: stable-8 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: Subject: svn commit: r213217 - stable/8/sys/dev/e1000 X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.5 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: Mon, 27 Sep 2010 17:50:58 -0000 Author: yongari Date: Mon Sep 27 17:50:56 2010 New Revision: 213217 URL: http://svn.freebsd.org/changeset/base/213217 Log: MFC r211909: If em(4) failed to allocate RX buffers, do not call panic(9). Just showing some buffer allocation error is more appropriate action for drivers. This should fix occasional panic reported on em(4) when driver encountered resource shortage. Reviewed by: jfv Modified: stable/8/sys/dev/e1000/if_em.c Directory Properties: stable/8/sys/ (props changed) stable/8/sys/amd64/include/xen/ (props changed) stable/8/sys/cddl/contrib/opensolaris/ (props changed) stable/8/sys/contrib/dev/acpica/ (props changed) stable/8/sys/contrib/pf/ (props changed) stable/8/sys/dev/xen/xenpci/ (props changed) Modified: stable/8/sys/dev/e1000/if_em.c ============================================================================== --- stable/8/sys/dev/e1000/if_em.c Mon Sep 27 17:49:05 2010 (r213216) +++ stable/8/sys/dev/e1000/if_em.c Mon Sep 27 17:50:56 2010 (r213217) @@ -3843,7 +3843,7 @@ em_setup_receive_ring(struct rx_ring *rx rxbuf = &rxr->rx_buffers[j]; rxbuf->m_head = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); if (rxbuf->m_head == NULL) - panic("RX ring hdr initialization failed!\n"); + return (ENOBUFS); rxbuf->m_head->m_len = MCLBYTES; rxbuf->m_head->m_flags &= ~M_HASFCS; /* we strip it */ rxbuf->m_head->m_pkthdr.len = MCLBYTES; @@ -3852,8 +3852,11 @@ em_setup_receive_ring(struct rx_ring *rx error = bus_dmamap_load_mbuf_sg(rxr->rxtag, rxbuf->map, rxbuf->m_head, seg, &nsegs, BUS_DMA_NOWAIT); - if (error != 0) - panic("RX ring dma initialization failed!\n"); + if (error != 0) { + m_freem(rxbuf->m_head); + rxbuf->m_head = NULL; + return (error); + } bus_dmamap_sync(rxr->rxtag, rxbuf->map, BUS_DMASYNC_PREREAD);