From patchwork Thu Dec 10 13:42:15 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Chen X-Patchwork-Id: 11964585 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.0 required=3.0 tests=BAYES_00,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0837DC1B0D9 for ; Thu, 10 Dec 2020 13:43:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B7E692311B for ; Thu, 10 Dec 2020 13:43:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389334AbgLJNnR (ORCPT ); Thu, 10 Dec 2020 08:43:17 -0500 Received: from mail.kernel.org ([198.145.29.99]:45234 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732601AbgLJNnR (ORCPT ); Thu, 10 Dec 2020 08:43:17 -0500 From: Peter Chen Authentication-Results: mail.kernel.org; dkim=permerror (bad message/signature format) To: pawell@cadence.com, rogerq@ti.com, robh+dt@kernel.org, frowand.list@gmail.com Cc: linux-usb@vger.kernel.org, linux-imx@nxp.com, a-govindraju@ti.com, frank.li@nxp.com, devicetree@vger.kernel.org, Peter Chen Subject: [PATCH 2/2] usb: cdns3: imx: assign platform_data_length for auxdata structure Date: Thu, 10 Dec 2020 21:42:15 +0800 Message-Id: <20201210134215.20424-2-peter.chen@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201210134215.20424-1-peter.chen@kernel.org> References: <20201210134215.20424-1-peter.chen@kernel.org> Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: Peter Chen In this case, the OF code will call platform_device_add_data to allocate platform_data using kmalloc, and avoid kfree issue when unload module. It fixed below oops: log1: [ 333.501593] Unable to handle kernel paging request at virtual address 000000000004ae48 [ 333.509558] Mem abort info: [ 333.512369] ESR = 0x96000006 [ 333.515476] EC = 0x25: DABT (current EL), IL = 32 bits [ 333.520847] SET = 0, FnV = 0 [ 333.523986] EA = 0, S1PTW = 0 [ 333.527193] Data abort info: [ 333.530124] ISV = 0, ISS = 0x00000006 [ 333.534004] CM = 0, WnR = 0 [ 333.536988] user pgtable: 4k pages, 48-bit VAs, pgdp=0000000885d73000 [ 333.543497] [000000000004ae48] pgd=0000000000000000, p4d=0000000000000000 [ 333.550354] Internal error: Oops: 96000006 [#1] PREEMPT SMP [ 333.555936] Modules linked in: fsl_jr_uio caam_jr caamkeyblob_desc caamhash_desc caamalg_desc crypto_engine rng_core authenc libdes crct10dif_ ce mxc_jpeg_encdec phy_mxs_usb phy_cadence_salvo imx8_media_dev(C) caam error [last unloaded: cdns3] [ 333.577484] CPU: 3 PID: 168 Comm: kworker/3:38 Tainted: G C 5.10.0-rc4-04454-gd479340c061 #30 [ 333.587313] Hardware name: Freescale i.MX8QXP MEK (DT) [ 333.592471] Workqueue: rcu_gp srcu_invoke_callbacks [ 333.597359] pstate: a0000005 (NzCv daif -PAN -UAO -TCO BTYPE=--) [ 333.603373] pc : kfree+0x78/0x3a0 [ 333.606690] lr : platform_device_release+0x28/0x58 [ 333.611481] sp : ffff8000135bbc20 [ 333.614800] x29: ffff8000135bbc20 x28: ffff800012146000 [ 333.620125] x27: ffff00083fa06470 x26: ffff800010108cb0 [ 333.625442] x25: 0080000000000000 x24: ffff80001240f000 [ 333.630767] x23: ffff0008012ef000 x22: ffff800010875478 [ 333.636093] x21: ffff8000092b90c8 x20: ffff000804bf1b00 [ 333.641418] x19: 000000000004ae40 x18: 0000000000000000 [ 333.646735] x17: 0000000000000000 x16: 0000000000000000 [ 333.652052] x15: 0000000000000000 x14: 0000000000000000 [ 333.657368] x13: 0000000000000002 x12: 0000000000000000 [ 333.662685] x11: 0000000000000040 x10: 0000000000000a00 [ 333.668000] x9 : ffff800010875478 x8 : fefefefefefefeff [ 333.673319] x7 : 0000000000000018 x6 : ffff00080101006c [ 333.678644] x5 : ffff00083fa5c300 x4 : 0000000000000000 [ 333.683969] x3 : 0000000000000002 x2 : 0000000000000000 [ 333.689286] x1 : 0000000000000030 x0 : fffffdffffe00000 [ 333.694605] Call trace: [ 333.697059] kfree+0x78/0x3a0 [ 333.700027] platform_device_release+0x28/0x58 [ 333.704476] device_release+0x38/0x90 [ 333.708144] kobject_put+0x78/0x208 [ 333.711633] __device_link_free_srcu+0x50/0x78 [ 333.716082] srcu_invoke_callbacks+0xf4/0x168 [ 333.720445] process_one_work+0x1c8/0x480 [ 333.724460] worker_thread+0x50/0x420 [ 333.728124] kthread+0x148/0x168 [ 333.731355] ret_from_fork+0x10/0x18 [ 333.734940] Code: b26babe0 d34cfe73 f2dfbfe0 8b131813 (f9400660) [ 333.741049] ---[ end trace 9a41d9fcbc0885e6 ]--- [ 333.745671] Kernel panic - not syncing: Oops: Fatal exception in interrupt [ 333.752551] SMP: stopping secondary CPUs [ 333.756485] Kernel Offset: disabled [ 333.759979] CPU features: 0x0240002,20002008 [ 333.764251] Memory Limit: none log2: [ 160.400179] kfree+0x78/0x3a0 [ 160.403147] platform_device_release+0x28/0x58 [ 160.407595] device_release+0x38/0x90 [ 160.411264] kobject_put+0x78/0x208 [ 160.414753] klist_children_put+0x1c/0x28 [ 160.418766] klist_next+0xac/0x128 [ 160.422172] device_for_each_child+0x4c/0xa8 [ 160.426453] cdns_imx_remove+0x2c/0x40 [cdns3_imx] [ 160.431251] platform_drv_remove+0x30/0x50 [ 160.435353] device_release_driver_internal+0x114/0x1e8 [ 160.440580] driver_detach+0x54/0xe0 [ 160.444163] bus_remove_driver+0x60/0xd8 [ 160.448087] driver_unregister+0x34/0x60 [ 160.452013] platform_driver_unregister+0x18/0x20 [ 160.456726] cdns_imx_driver_exit+0x14/0x478 [cdns3_imx] [ 160.462042] __arm64_sys_delete_module+0x180/0x258 [ 160.466837] el0_svc_common.constprop.0+0x70/0x168 [ 160.471631] do_el0_svc+0x28/0x88 [ 160.474950] el0_sync_handler+0x158/0x160 [ 160.478961] el0_sync+0x140/0x180 Signed-off-by: Peter Chen --- drivers/usb/cdns3/cdns3-imx.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/usb/cdns3/cdns3-imx.c b/drivers/usb/cdns3/cdns3-imx.c index f03562c76a50..67c9b789d3b2 100644 --- a/drivers/usb/cdns3/cdns3-imx.c +++ b/drivers/usb/cdns3/cdns3-imx.c @@ -158,6 +158,7 @@ static const struct of_dev_auxdata cdns_imx_auxdata[] = { { .compatible = "cdns,usb3", .platform_data = &cdns_imx_pdata, + .platform_data_length = sizeof(cdns_imx_pdata), }, {}, };