From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:54790 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751040AbdLaKQ3 (ORCPT ); Sun, 31 Dec 2017 05:16:29 -0500 Subject: Patch "tg3: Fix rx hang on MTU change with 5717/5719" has been added to the 4.14-stable tree To: brking@linux.vnet.ibm.com, davem@davemloft.net, gregkh@linuxfoundation.org Cc: , From: Date: Sun, 31 Dec 2017 11:14:58 +0100 Message-ID: <151471529819718@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled tg3: Fix rx hang on MTU change with 5717/5719 to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: tg3-fix-rx-hang-on-mtu-change-with-5717-5719.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From foo@baz Sun Dec 31 11:12:48 CET 2017 From: Brian King Date: Fri, 15 Dec 2017 15:21:50 -0600 Subject: tg3: Fix rx hang on MTU change with 5717/5719 From: Brian King [ Upstream commit 748a240c589824e9121befb1cba5341c319885bc ] This fixes a hang issue seen when changing the MTU size from 1500 MTU to 9000 MTU on both 5717 and 5719 chips. In discussion with Broadcom, they've indicated that these chipsets have the same phy as the 57766 chipset, so the same workarounds apply. This has been tested by IBM on both Power 8 and Power 9 systems as well as by Broadcom on x86 hardware and has been confirmed to resolve the hang issue. Signed-off-by: Brian King Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/broadcom/tg3.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/drivers/net/ethernet/broadcom/tg3.c +++ b/drivers/net/ethernet/broadcom/tg3.c @@ -14227,7 +14227,9 @@ static int tg3_change_mtu(struct net_dev /* Reset PHY, otherwise the read DMA engine will be in a mode that * breaks all requests to 256 bytes. */ - if (tg3_asic_rev(tp) == ASIC_REV_57766) + if (tg3_asic_rev(tp) == ASIC_REV_57766 || + tg3_asic_rev(tp) == ASIC_REV_5717 || + tg3_asic_rev(tp) == ASIC_REV_5719) reset_phy = true; err = tg3_restart_hw(tp, reset_phy); Patches currently in stable-queue which might be from brking@linux.vnet.ibm.com are queue-4.14/tg3-fix-rx-hang-on-mtu-change-with-5717-5719.patch