From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753407AbcDZSWT (ORCPT ); Tue, 26 Apr 2016 14:22:19 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:56642 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753351AbcDZST2 (ORCPT ); Tue, 26 Apr 2016 14:19:28 -0400 From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Brian Hutchinson , Neil Armstrong , "David S . Miller" , Kamal Mostafa Subject: [PATCH 4.2.y-ckt 89/93] net: ethernet: davinci_emac: Fix platform_data overwrite Date: Tue, 26 Apr 2016 11:17:29 -0700 Message-Id: <1461694653-29506-90-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1461694653-29506-1-git-send-email-kamal@canonical.com> References: <1461694653-29506-1-git-send-email-kamal@canonical.com> X-Extended-Stable: 4.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.2.8-ckt9 -stable review patch. If anyone has any objections, please let me know. ---8<------------------------------------------------------------ From: Neil Armstrong commit 210990b05a1247886539078e857cd038881bb2d6 upstream. When the DaVinci emac driver is removed and re-probed, the actual pdev->dev.platform_data is populated with an unwanted valid pointer saved by the previous davinci_emac_of_get_pdata() call, causing a kernel crash when calling priv->int_disable() in emac_int_disable(). Unable to handle kernel paging request at virtual address c8622a80 ... [] (emac_int_disable) from [] (emac_dev_open+0x290/0x5f8) [] (emac_dev_open) from [] (__dev_open+0xb8/0x120) [] (__dev_open) from [] (__dev_change_flags+0x88/0x14c) [] (__dev_change_flags) from [] (dev_change_flags+0x18/0x48) [] (dev_change_flags) from [] (devinet_ioctl+0x6b4/0x7ac) [] (devinet_ioctl) from [] (sock_ioctl+0x1d8/0x2c0) [] (sock_ioctl) from [] (do_vfs_ioctl+0x41c/0x600) [] (do_vfs_ioctl) from [] (SyS_ioctl+0x6c/0x7c) [] (SyS_ioctl) from [] (ret_fast_syscall+0x0/0x1c) Fixes: 42f59967a091 ("net: ethernet: davinci_emac: add OF support") Cc: Brian Hutchinson Signed-off-by: Neil Armstrong Signed-off-by: David S. Miller Signed-off-by: Kamal Mostafa --- drivers/net/ethernet/ti/davinci_emac.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/net/ethernet/ti/davinci_emac.c b/drivers/net/ethernet/ti/davinci_emac.c index d5c5143..0ec6e2f 100644 --- a/drivers/net/ethernet/ti/davinci_emac.c +++ b/drivers/net/ethernet/ti/davinci_emac.c @@ -1877,8 +1877,6 @@ davinci_emac_of_get_pdata(struct platform_device *pdev, struct emac_priv *priv) pdata->hw_ram_addr = auxdata->hw_ram_addr; } - pdev->dev.platform_data = pdata; - return pdata; } -- 2.7.4