Bug 8821

Summary:	BUG on "rmmod parport_pc"
Product:	Drivers	Reporter:	Stas Sergeev (stsp2)
Component:	Parallel	Assignee:	drivers_parallel
Status:	RESOLVED CODE_FIX
Severity:	normal
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.22	Subsystem:
Regression:	---	Bisected commit-id:

Description Stas Sergeev 2007-07-28 06:07:42 UTC

Most recent kernel where this bug did not occur:
dont know

Distribution:
F7

Hardware Environment:
x86_64 PC

Software Environment:
Linux lin2 2.6.22 #7 SMP PREEMPT Sat Jul 28 15:21:15 MSD 2007 x86_64 x86_64 x86_64 GNU/Linux

Problem Description:
# rmmod parport_pc
BUG: sleeping function called from invalid context at kernel/mutex.c:86
in_atomic():1, irqs_disabled():0

Call Trace:
 [<ffffffff8022651a>] complete+0x4a/0x60
 [<ffffffff80226af0>] __might_sleep+0xb0/0xd0
 [<ffffffff804b14bd>] mutex_lock+0x1d/0x40
 [<ffffffff802d76ae>] sysfs_hash_and_remove+0x5e/0x160
 [<ffffffff802d7f80>] sysfs_remove_file+0x10/0x20
 [<ffffffff803bea30>] device_remove_file+0x30/0x50
 [<ffffffff803becd1>] device_del+0x1d1/0x320
 [<ffffffff803c3a1e>] platform_device_del+0x1e/0x80
 [<ffffffff803c3ee1>] platform_device_unregister+0x11/0x20
 [<ffffffff881b28c8>] :parport_pc:parport_pc_exit+0x98/0xc5
 [<ffffffff8025154f>] sys_delete_module+0x16f/0x1f0
 [<ffffffff8020994e>] system_call+0x7e/0x83

Steps to reproduce:
# rmmod parport_pc

Comment 1 Andrew Morton 2007-07-28 10:09:21 UTC

Added parport_pc-locking-fix.patch to -mm.