Hi, rmmod on ide-cd_mod causes this oops: BUG: unable to handle kernel paging request at 83535683 IP: [<c0246ffa>] ide_device_put+0xc/0x33 *pde = 00000000 Oops: 0000 [#1] PREEMPT last sysfs file: /sys/devices/pci0000:00/0000:00:01.0/0000:01:05.0/resource Modules linked in: radeon drm nfsd lockd sunrpc exportfs pcmcia uhci_hcd ehci_hcd usbcore snd_ali5451 yenta_socket pcspkr snd_ac97_codec ac97_bus rsrc_nonstatic snd_pcm snd_timer ati_agp agpgart snd soundcore snd_page_alloc ide_cd_mod(-) cdrom 8139too psmouse sony_laptop backlight floppy rtc Pid: 3890, comm: rmmod Not tainted (2.6.27-rc1-mm1 #2) EIP: 0060:[<c0246ffa>] EFLAGS: 00010286 CPU: 0 EIP is at ide_device_put+0xc/0x33 EAX: 83535657 EBX: dc927a00 ECX: 00000003 EDX: 00000001 ESI: dec34e34 EDI: dec34e34 EBP: d9f46ee0 ESP: d9f46edc DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068 Process rmmod (pid: 3890, ti=d9f46000 task=dd88e780 task.ti=d9f46000) Stack: dc927c00 d9f46eec dec2e202 dc927c00 d9f46ef8 dec2e225 dd9138dc d9f46f00 c02469e0 d9f46f10 c024156f dd9138dc dd9139f4 d9f46f24 c024162c 00000880 dec34e34 c0397dc0 d9f46f38 c0240a33 00000880 dec34e34 00000000 d9f46f48 Call Trace: [<dec2e202>] ? ide_cd_put+0x26/0x33 [ide_cd_mod] [<dec2e225>] ? ide_cd_remove+0x16/0x19 [ide_cd_mod] [<c02469e0>] ? generic_ide_remove+0x1a/0x1e [<c024156f>] ? __device_release_driver+0x59/0x7f [<c024162c>] ? driver_detach+0x97/0x99 [<c0240a33>] ? bus_remove_driver+0x6f/0x8b [<c02419f1>] ? driver_unregister+0x2f/0x33 [<dec31331>] ? ide_cdrom_exit+0xd/0xf [ide_cd_mod] [<c014265a>] ? sys_delete_module+0x10d/0x1e2 [<c015fedc>] ? do_munmap+0x1d7/0x234 [<c01e8684>] ? trace_hardirqs_on_thunk+0xc/0x10 [<c0103015>] ? sysenter_do_call+0x12/0x35 ======================= Code: ff ff 89 44 24 08 c7 44 24 04 a7 de 35 c0 89 34 24 e8 cb ce f9 ff 31 c0 83 c4 0c 5b 5e 5d c3 55 89 e5 53 89 c3 8b 40 24 8b 40 10 <8b> 40 2c 85 c0 74 12 8b 80 44 01 00 00 8b 40 08 85 c0 74 05 e8 EIP: [<c0246ffa>] ide_device_put+0xc/0x33 SS:ESP 0068:d9f46edc ---[ end trace a2eed48430d87636 ]--- this is easily reporoducible, more investigation points here: (gdb) l *ide_device_put+0xc 0xc0246ffa is in ide_device_put (/home/mako/linux/lkt/sources/linux-2.6.27-rc1-mm1/drivers/ide/ide.c:717). 712 * the underlying LLDD module. 713 */ 714 void ide_device_put(ide_drive_t *drive) 715 { 716 #ifdef CONFIG_MODULE_UNLOAD 717 struct device *host_dev = drive->hwif->host->dev[0]; <-------------------------- 718 struct module *module = host_dev ? host_dev->driver->owner : NULL; 719 720 if (module) 721 module_put(module); Mariusz -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html