From patchwork Tue Nov 19 13:17:40 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luis Henriques X-Patchwork-Id: 292384 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from huckleberry.canonical.com (huckleberry.canonical.com [91.189.94.19]) by ozlabs.org (Postfix) with ESMTP id EE9AC2C0127 for ; Wed, 20 Nov 2013 00:17:59 +1100 (EST) Received: from localhost ([127.0.0.1] helo=huckleberry.canonical.com) by huckleberry.canonical.com with esmtp (Exim 4.76) (envelope-from ) id 1VilBc-0001Mx-KJ; Tue, 19 Nov 2013 13:17:48 +0000 Received: from youngberry.canonical.com ([91.189.89.112]) by huckleberry.canonical.com with esmtp (Exim 4.76) (envelope-from ) id 1VilBW-0001MG-OA for kernel-team@lists.ubuntu.com; Tue, 19 Nov 2013 13:17:42 +0000 Received: from bl22-241-75.dsl.telepac.pt ([2.83.241.75] helo=localhost) by youngberry.canonical.com with esmtpsa (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1VilBW-00005E-6m; Tue, 19 Nov 2013 13:17:42 +0000 From: Luis Henriques To: Sebastian Andrzej Siewior Subject: [3.5.y.z extended stable] Patch "usb: musb: cancel work on removal" has been added to staging queue Date: Tue, 19 Nov 2013 13:17:40 +0000 Message-Id: <1384867060-22714-1-git-send-email-luis.henriques@canonical.com> X-Mailer: git-send-email 1.8.3.2 X-Extended-Stable: 3.5 Cc: kernel-team@lists.ubuntu.com, Felipe Balbi X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.14 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: kernel-team-bounces@lists.ubuntu.com This is a note to let you know that I have just added a patch titled usb: musb: cancel work on removal to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.5.y.z tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Luis ------ From f9b66c920b9dfc1e174b28cd1439a76a469f2690 Mon Sep 17 00:00:00 2001 From: Sebastian Andrzej Siewior Date: Thu, 10 Oct 2013 18:26:59 +0200 Subject: usb: musb: cancel work on removal commit c5340bd14336b902604ab95212a8877de109d9ae upstream. So I captured this: |WARNING: CPU: 0 PID: 2078 at /home/bigeasy/work/new/TI/linux/lib/debugobjects.c:260 debug_print_object+0x94/0xc4() |ODEBUG: free active (active state 0) object type: work_struct hint: musb_irq_work+0x0/0x38 [musb_hdrc] |CPU: 0 PID: 2078 Comm: rmmod Not tainted 3.12.0-rc4+ #338 |[] (unwind_backtrace+0x0/0xf4) from [] (show_stack+0x14/0x1c) |[] (show_stack+0x14/0x1c) from [] (warn_slowpath_common+0x64/0x84) |[] (warn_slowpath_common+0x64/0x84) from [] (warn_slowpath_fmt+0x30/0x40) |[] (warn_slowpath_fmt+0x30/0x40) from [] (debug_print_object+0x94/0xc4) |[] (debug_print_object+0x94/0xc4) from [] (debug_check_no_obj_freed+0x1c0/0x228) |[] (debug_check_no_obj_freed+0x1c0/0x228) from [] (kfree+0xf8/0x228) |[] (kfree+0xf8/0x228) from [] (release_nodes+0x1a8/0x248) |[] (release_nodes+0x1a8/0x248) from [] (__device_release_driver+0x98/0xf0) |[] (__device_release_driver+0x98/0xf0) from [] (device_release_driver+0x24/0x34) |[] (device_release_driver+0x24/0x34) from [] (bus_remove_device+0x148/0x15c) |[] (bus_remove_device+0x148/0x15c) from [] (device_del+0x104/0x1c0) |[] (device_del+0x104/0x1c0) from [] (platform_device_del+0x18/0xac) |[] (platform_device_del+0x18/0xac) from [] (platform_device_unregister+0xc/0x18) |[] (platform_device_unregister+0xc/0x18) from [] (dsps_remove+0x20/0x4c [musb_dsps]) |[] (dsps_remove+0x20/0x4c [musb_dsps]) from [] (platform_drv_remove+0x1c/0x24) |[] (platform_drv_remove+0x1c/0x24) from [] (__device_release_driver+0x90/0xf0) |[] (__device_release_driver+0x90/0xf0) from [] (driver_detach+0xb4/0xb8) |[] (driver_detach+0xb4/0xb8) from [] (bus_remove_driver+0x98/0xec) |[] (bus_remove_driver+0x98/0xec) from [] (SyS_delete_module+0x1e0/0x24c) |[] (SyS_delete_module+0x1e0/0x24c) from [] (ret_fast_syscall+0x0/0x48) |---[ end trace d79045419a3e51ec ]--- The workqueue is only scheduled from the ep0 and never canceled in case the musb is removed before the work has a chance to run. Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Felipe Balbi [ luis: backported to 3.5: adjusted context ] Signed-off-by: Luis Henriques --- drivers/usb/musb/musb_core.c | 1 + 1 file changed, 1 insertion(+) -- 1.8.3.2 diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index fde4898..f9da63e 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -1855,6 +1855,7 @@ static void musb_free(struct musb *musb) disable_irq_wake(musb->nIrq); free_irq(musb->nIrq, musb); } + cancel_work_sync(&musb->irq_work); if (is_dma_capable() && musb->dma_controller) { struct dma_controller *c = musb->dma_controller;