From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1162263Ab2GLWym (ORCPT ); Thu, 12 Jul 2012 18:54:42 -0400 Received: from mail-pb0-f46.google.com ([209.85.160.46]:61447 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1162176Ab2GLWo1 (ORCPT ); Thu, 12 Jul 2012 18:44:27 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Greg KH , torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Bruce Allan , Jeff Pieper , Jeff Kirsher , "David S. Miller" Subject: [ 143/187] e1000e: test for valid check_reset_block function pointer Date: Thu, 12 Jul 2012 15:34:59 -0700 Message-Id: <20120712191535.671333252@linuxfoundation.org> X-Mailer: git-send-email 1.7.10.1.362.g242cab3 In-Reply-To: <20120712191522.742634173@linuxfoundation.org> References: <20120712192421.GA28926@kroah.com> <20120712191522.742634173@linuxfoundation.org> User-Agent: quilt/0.60-20.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Greg KH 3.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Bruce Allan commit 470a54207ccf7045a59df727573bd9d148988582 upstream. commit 44abd5c12767a8c567dc4e45fd9aec3b13ca85e0 introduced NULL pointer dereferences when attempting to access the check_reset_block function pointer on 8257x and 80003es2lan non-copper devices. This fix should be applied back through 3.4. Signed-off-by: Bruce Allan Tested-by: Jeff Pieper Signed-off-by: Jeff Kirsher Acked-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/intel/e1000e/ethtool.c | 6 ++++-- drivers/net/ethernet/intel/e1000e/mac.c | 2 +- drivers/net/ethernet/intel/e1000e/netdev.c | 4 ++-- drivers/net/ethernet/intel/e1000e/phy.c | 8 +++++--- 4 files changed, 12 insertions(+), 8 deletions(-) --- a/drivers/net/ethernet/intel/e1000e/ethtool.c +++ b/drivers/net/ethernet/intel/e1000e/ethtool.c @@ -258,7 +258,8 @@ static int e1000_set_settings(struct net * When SoL/IDER sessions are active, autoneg/speed/duplex * cannot be changed */ - if (hw->phy.ops.check_reset_block(hw)) { + if (hw->phy.ops.check_reset_block && + hw->phy.ops.check_reset_block(hw)) { e_err("Cannot change link characteristics when SoL/IDER is " "active.\n"); return -EINVAL; @@ -1604,7 +1605,8 @@ static int e1000_loopback_test(struct e1 * PHY loopback cannot be performed if SoL/IDER * sessions are active */ - if (hw->phy.ops.check_reset_block(hw)) { + if (hw->phy.ops.check_reset_block && + hw->phy.ops.check_reset_block(hw)) { e_err("Cannot do PHY loopback test when SoL/IDER is active.\n"); *data = 0; goto out; --- a/drivers/net/ethernet/intel/e1000e/mac.c +++ b/drivers/net/ethernet/intel/e1000e/mac.c @@ -709,7 +709,7 @@ s32 e1000e_setup_link_generic(struct e10 * In the case of the phy reset being blocked, we already have a link. * We do not need to set it up again. */ - if (hw->phy.ops.check_reset_block(hw)) + if (hw->phy.ops.check_reset_block && hw->phy.ops.check_reset_block(hw)) return 0; /* --- a/drivers/net/ethernet/intel/e1000e/netdev.c +++ b/drivers/net/ethernet/intel/e1000e/netdev.c @@ -6209,7 +6209,7 @@ static int __devinit e1000_probe(struct adapter->hw.phy.ms_type = e1000_ms_hw_default; } - if (hw->phy.ops.check_reset_block(hw)) + if (hw->phy.ops.check_reset_block && hw->phy.ops.check_reset_block(hw)) e_info("PHY reset is blocked due to SOL/IDER session.\n"); /* Set initial default active device features */ @@ -6376,7 +6376,7 @@ err_register: if (!(adapter->flags & FLAG_HAS_AMT)) e1000e_release_hw_control(adapter); err_eeprom: - if (!hw->phy.ops.check_reset_block(hw)) + if (hw->phy.ops.check_reset_block && !hw->phy.ops.check_reset_block(hw)) e1000_phy_hw_reset(&adapter->hw); err_hw_init: kfree(adapter->tx_ring); --- a/drivers/net/ethernet/intel/e1000e/phy.c +++ b/drivers/net/ethernet/intel/e1000e/phy.c @@ -2121,9 +2121,11 @@ s32 e1000e_phy_hw_reset_generic(struct e s32 ret_val; u32 ctrl; - ret_val = phy->ops.check_reset_block(hw); - if (ret_val) - return 0; + if (phy->ops.check_reset_block) { + ret_val = phy->ops.check_reset_block(hw); + if (ret_val) + return 0; + } ret_val = phy->ops.acquire(hw); if (ret_val)