From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugme-daemon@bugzilla.kernel.org
Subject: [Bug 11713] bugcheck with modprobe -r sym53c8xx
Date: Tue, 16 Dec 2008 12:37:52 -0800 (PST)
Message-ID: <20081216203752.4797910800E@picon.linux-foundation.org>
References:
Return-path:
Received: from smtp1.linux-foundation.org ([140.211.169.13]:54918 "EHLO
smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK)
by vger.kernel.org with ESMTP id S1752265AbYLPUiM (ORCPT
);
Tue, 16 Dec 2008 15:38:12 -0500
Received: from picon.linux-foundation.org (picon.linux-foundation.org [140.211.169.79])
by smtp1.linux-foundation.org (8.14.2/8.13.5/Debian-3ubuntu1.1) with ESMTP id mBGKbq2P022979
for ; Tue, 16 Dec 2008 12:37:53 -0800
In-Reply-To:
Sender: linux-scsi-owner@vger.kernel.org
List-Id: linux-scsi@vger.kernel.org
To: linux-scsi@vger.kernel.org
http://bugzilla.kernel.org/show_bug.cgi?id=11713
------- Comment #1 from tonyb@cybernetics.com 2008-12-16 12:37 -------
http://marc.info/?l=linux-scsi&m=120102742932161&w=2
When unloading, sym53c8xx calls dma_free_coherent() while holding a
spinlock (sym53c8xx_lock) with irqs disabled, which produces the
following warning with 2.6.24:
modprobe sym53c8xx
modprobe -r sym53c8xx
sym0: detaching ...
sym0: resetting chip
WARNING: at arch/x86/kernel/pci-dma_32.c:66 dma_free_coherent()
Pid: 682, comm: rmmod Not tainted 2.6.24-rc8-git5 #1
[] dma_free_coherent+0x95/0xa0
[] ___free_dma_mem_cluster+0x46/0x70 [sym53c8xx]
[] __sym_mfree+0x6d/0xc0 [sym53c8xx]
[] smp_call_function+0x1c/0x20
[] on_each_cpu+0x28/0x40
[] __sym_mfree_dma+0x5e/0xb0 [sym53c8xx]
[] sym_hcb_free+0x70/0x170 [sym53c8xx]
[] sym_free_resources+0x3c/0x70 [sym53c8xx]
[] sym_detach+0x8c/0xb0 [sym53c8xx]
[] sym2_remove+0x29/0x50 [sym53c8xx]
[] pci_device_remove+0x16/0x40
[] __device_release_driver+0x68/0xb0
[] driver_detach+0xa4/0xb0
[] bus_remove_driver+0x73/0xa0
[] pci_unregister_driver+0xe/0x70
[] sym2_exit+0x0/0x7d [sym53c8xx]
[] sym2_exit+0xa/0x7d [sym53c8xx]
[] sys_delete_module+0x11b/0x1b0
[] do_page_fault+0xe9/0x640
[] do_munmap+0x197/0x1f0
[] sysenter_past_esp+0x5f/0x85
[] __lro_proc_segment+0x130/0x300
=======================
However, everything does work OK at least on i386; the warning is for
portability to other archs (ARM and MIPS). This warning was added in
2.6.24-rc1, so the message does not appear in 2.6.23, although it is not
really a regression. This appears non-trivial to fix, since the
spinlock protects access to higher-level data structures.
--
Configure bugmail: http://bugzilla.kernel.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.