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Date: Wed, 16 Jan 2013 00:55:20 +0100
From: "Rafael J. Wysocki" <rjw@...k.pl>
To: Yinghai Lu <yinghai@...nel.org>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>, Len Brown <lenb@...nel.org>,
Taku Izumi <izumi.taku@...fujitsu.com>,
Jiang Liu <jiang.liu@...wei.com>, linux-pci@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org
Subject: Re: [PATCH v8 14/22] ACPI: update ej_event interface to take acpi_device
On Tuesday, January 15, 2013 03:43:17 PM Yinghai Lu wrote:
> On Tue, Jan 15, 2013 at 3:26 AM, Rafael J. Wysocki <rjw@...k.pl> wrote:
> > On Monday, January 14, 2013 10:55:49 PM Yinghai Lu wrote:
> >> On Sat, Jan 12, 2013 at 3:40 PM, Rafael J. Wysocki <rjw@...k.pl> wrote:
> >> > On Friday, January 11, 2013 02:40:41 PM Yinghai Lu wrote:
> >> >> Should use acpi_device pointer directly instead of use handle and
> >> >> get the device pointer again later.
> >> >
> >> > Looks good.
> >> >
> >> > I can take this one right now if you want.
> >>
> >> yes, in acpi-scan branch?
> >>
> >> othewise i can not base on pci/next again.
> >
> > OK
> >
> > So I think there will be more patches in acpi-scan you'll need anyway, so
> > I'll put this one on that branch too.
>
> after updating pci root bus hotplug patches against your linux-next,
> got panic during removal:
>
> echo "PCI0 3" > /sys/kernel/debug/acpi/sci_notify
> [ 55.223155] ACPI: ACPI device name is <PCI0>, event code is <3>
> [ 55.226746] ACPI: Notify event is queued
> [ 55.228648] _handle_hotplug_event_root: Device eject notify on \_SB_.PCI0
> 10:~ # [ 55.340169] ACPI: Device 0000:00:03.0 -x-> \_SB_.PCI0.S03_
> [ 55.341040] ACPI: Device 0000:00:02.0 -x-> \_SB_.PCI0.VGA_
> [ 55.341711] i2c i2c-0: adapter [SMBus PIIX4 adapter at b100] unregistered
> [ 55.342585] i2c-dev: adapter [SMBus PIIX4 adapter at b100] unregistered
> [ 55.343522] ACPI: Device 0000:00:01.3 -x-> \_SB_.PCI0.PX13
> [ 55.344660] ata1.00: disabled
> [ 55.350377] sd 0:0:0:0: [sda] Synchronizing SCSI cache
> [ 55.352729] sd 0:0:0:0: [sda]
> [ 55.353405] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
> [ 55.354010] sd 0:0:0:0: [sda] Stopping disk
> [ 55.358144] sd 0:0:0:0: [sda] START_STOP FAILED
> [ 55.358660] sd 0:0:0:0: [sda]
> [ 55.359026] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
> [ 55.361348] ata2.00: disabled
> [ 55.371548] ACPI: Device 0000:00:01.0 -x-> \_SB_.PCI0.ISA_
> [ 55.372268] ACPI: Device pci0000:00 -x-> \_SB_.PCI0
> [ 55.372747] remove_bridge is called for \_SB_.PCI0 ffff8801964661e0
> [ 55.373581] acpiphp: Slot [31] unregistered
> [ 55.374110] pci_hotplug: pci_hp_deregister: Removed slot 31 from the list
> [ 55.374720] acpiphp: release_slot - physical_slot = 31
> [ 55.375195] pci_bus 0000:00: dev 1f, dec refcount to 0
> [ 55.375781] pci_bus 0000:00: dev 1f, released physical slot 31
> [ 55.376370] acpiphp: Slot [30] unregistered
> [ 55.376839] pci_hotplug: pci_hp_deregister: Removed slot 30 from the list
> [ 55.377512] acpiphp: release_slot - physical_slot = 30
> [ 55.377968] pci_bus 0000:00: dev 1e, dec refcount to 0
> [ 55.378432] pci_bus 0000:00: dev 1e, released physical slot 30
> [ 55.378976] acpiphp: Slot [29] unregistered
> [ 55.379375] pci_hotplug: pci_hp_deregister: Removed slot 29 from the list
> [ 55.379977] acpiphp: release_slot - physical_slot = 29
> [ 55.380479] pci_bus 0000:00: dev 1d, dec refcount to 0
> [ 55.380967] pci_bus 0000:00: dev 1d, released physical slot 29
> [ 55.381484] acpiphp: Slot [28] unregistered
> [ 55.381860] pci_hotplug: pci_hp_deregister: Removed slot 28 from the list
> [ 55.382485] acpiphp: release_slot - physical_slot = 28
> [ 55.383067] pci_bus 0000:00: dev 1c, dec refcount to 0
> [ 55.384426] pci_bus 0000:00: dev 1c, released physical slot 28
> [ 55.385830] acpiphp: Slot [27] unregistered
> [ 55.386852] pci_hotplug: pci_hp_deregister: Removed slot 27 from the list
> [ 55.388511] acpiphp: release_slot - physical_slot = 27
> [ 55.389750] pci_bus 0000:00: dev 1b, dec refcount to 0
> [ 55.390994] pci_bus 0000:00: dev 1b, released physical slot 27
> [ 55.392418] acpiphp: Slot [26] unregistered
> [ 55.393419] pci_hotplug: pci_hp_deregister: Removed slot 26 from the list
> [ 55.395034] acpiphp: release_slot - physical_slot = 26
> [ 55.396283] pci_bus 0000:00: dev 1a, dec refcount to 0
> [ 55.397514] pci_bus 0000:00: dev 1a, released physical slot 26
> [ 55.398901] acpiphp: Slot [25] unregistered
> [ 55.399927] pci_hotplug: pci_hp_deregister: Removed slot 25 from the list
> [ 55.401059] acpiphp: release_slot - physical_slot = 25
> [ 55.401761] pci_bus 0000:00: dev 19, dec refcount to 0
> [ 55.402715] pci_bus 0000:00: dev 19, released physical slot 25
> [ 55.403838] acpiphp: Slot [24] unregistered
> [ 55.404892] pci_hotplug: pci_hp_deregister: Removed slot 24 from the list
> [ 55.406501] acpiphp: release_slot - physical_slot = 24
> [ 55.407720] pci_bus 0000:00: dev 18, dec refcount to 0
> [ 55.409001] pci_bus 0000:00: dev 18, released physical slot 24
> [ 55.410220] acpiphp: Slot [23] unregistered
> [ 55.410951] pci_hotplug: pci_hp_deregister: Removed slot 23 from the list
> [ 55.412601] acpiphp: release_slot - physical_slot = 23
> [ 55.413840] pci_bus 0000:00: dev 17, dec refcount to 0
> [ 55.415092] pci_bus 0000:00: dev 17, released physical slot 23
> [ 55.416510] acpiphp: Slot [22] unregistered
> [ 55.417529] pci_hotplug: pci_hp_deregister: Removed slot 22 from the list
> [ 55.419153] acpiphp: release_slot - physical_slot = 22
> [ 55.420415] pci_bus 0000:00: dev 16, dec refcount to 0
> [ 55.421665] pci_bus 0000:00: dev 16, released physical slot 22
> [ 55.423069] acpiphp: Slot [21] unregistered
> [ 55.424110] pci_hotplug: pci_hp_deregister: Removed slot 21 from the list
> [ 55.425722] acpiphp: release_slot - physical_slot = 21
> [ 55.426952] pci_bus 0000:00: dev 15, dec refcount to 0
> [ 55.428209] pci_bus 0000:00: dev 15, released physical slot 21
> [ 55.429578] acpiphp: Slot [20] unregistered
> [ 55.430219] pci_hotplug: pci_hp_deregister: Removed slot 20 from the list
> [ 55.431123] acpiphp: release_slot - physical_slot = 20
> [ 55.431796] pci_bus 0000:00: dev 14, dec refcount to 0
> [ 55.432986] pci_bus 0000:00: dev 14, released physical slot 20
> [ 55.434392] acpiphp: Slot [19] unregistered
> [ 55.435411] pci_hotplug: pci_hp_deregister: Removed slot 19 from the list
> [ 55.437051] acpiphp: release_slot - physical_slot = 19
> [ 55.438309] pci_bus 0000:00: dev 13, dec refcount to 0
> [ 55.439556] pci_bus 0000:00: dev 13, released physical slot 19
> [ 55.440987] acpiphp: Slot [18] unregistered
> [ 55.441993] pci_hotplug: pci_hp_deregister: Removed slot 18 from the list
> [ 55.443511] acpiphp: release_slot - physical_slot = 18
> [ 55.444269] pci_bus 0000:00: dev 12, dec refcount to 0
> [ 55.445522] pci_bus 0000:00: dev 12, released physical slot 18
> [ 55.446949] acpiphp: Slot [17] unregistered
> [ 55.447961] pci_hotplug: pci_hp_deregister: Removed slot 17 from the list
> [ 55.449610] acpiphp: release_slot - physical_slot = 17
> [ 55.450839] pci_bus 0000:00: dev 11, dec refcount to 0
> [ 55.452097] pci_bus 0000:00: dev 11, released physical slot 17
> [ 55.453501] acpiphp: Slot [16] unregistered
> [ 55.454509] pci_hotplug: pci_hp_deregister: Removed slot 16 from the list
> [ 55.456151] acpiphp: release_slot - physical_slot = 16
> [ 55.457370] pci_bus 0000:00: dev 10, dec refcount to 0
> [ 55.458601] pci_bus 0000:00: dev 10, released physical slot 16
> [ 55.459775] acpiphp: Slot [15] unregistered
> [ 55.460444] pci_hotplug: pci_hp_deregister: Removed slot 15 from the list
> [ 55.461354] acpiphp: release_slot - physical_slot = 15
> [ 55.462059] pci_bus 0000:00: dev 0f, dec refcount to 0
> [ 55.462985] pci_bus 0000:00: dev 0f, released physical slot 15
> [ 55.464475] acpiphp: Slot [14] unregistered
> [ 55.465481] pci_hotplug: pci_hp_deregister: Removed slot 14 from the list
> [ 55.467089] acpiphp: release_slot - physical_slot = 14
> [ 55.468351] pci_bus 0000:00: dev 0e, dec refcount to 0
> [ 55.469597] pci_bus 0000:00: dev 0e, released physical slot 14
> [ 55.470994] acpiphp: Slot [13] unregistered
> [ 55.472033] pci_hotplug: pci_hp_deregister: Removed slot 13 from the list
> [ 55.473650] acpiphp: release_slot - physical_slot = 13
> [ 55.474878] pci_bus 0000:00: dev 0d, dec refcount to 0
> [ 55.476144] pci_bus 0000:00: dev 0d, released physical slot 13
> [ 55.477198] acpiphp: Slot [12] unregistered
> [ 55.477926] pci_hotplug: pci_hp_deregister: Removed slot 12 from the list
> [ 55.479561] acpiphp: release_slot - physical_slot = 12
> [ 55.480816] pci_bus 0000:00: dev 0c, dec refcount to 0
> [ 55.482073] pci_bus 0000:00: dev 0c, released physical slot 12
> [ 55.483475] acpiphp: Slot [11] unregistered
> [ 55.484515] pci_hotplug: pci_hp_deregister: Removed slot 11 from the list
> [ 55.486123] acpiphp: release_slot - physical_slot = 11
> [ 55.487338] pci_bus 0000:00: dev 0b, dec refcount to 0
> [ 55.488597] pci_bus 0000:00: dev 0b, released physical slot 11
> [ 55.489670] acpiphp: Slot [10] unregistered
> [ 55.490285] pci_hotplug: pci_hp_deregister: Removed slot 10 from the list
> [ 55.491700] acpiphp: release_slot - physical_slot = 10
> [ 55.492975] pci_bus 0000:00: dev 0a, dec refcount to 0
> [ 55.493800] pci_bus 0000:00: dev 0a, released physical slot 10
> [ 55.495103] acpiphp: Slot [9] unregistered
> [ 55.496121] pci_hotplug: pci_hp_deregister: Removed slot 9 from the list
> [ 55.497715] acpiphp: release_slot - physical_slot = 9
> [ 55.498929] pci_bus 0000:00: dev 09, dec refcount to 0
> [ 55.500206] pci_bus 0000:00: dev 09, released physical slot 9
> [ 55.501588] acpiphp: Slot [8] unregistered
> [ 55.502584] pci_hotplug: pci_hp_deregister: Removed slot 8 from the list
> [ 55.504196] acpiphp: release_slot - physical_slot = 8
> [ 55.505405] pci_bus 0000:00: dev 08, dec refcount to 0
> [ 55.506652] pci_bus 0000:00: dev 08, released physical slot 8
> [ 55.508057] acpiphp: Slot [7] unregistered
> [ 55.509060] pci_hotplug: pci_hp_deregister: Removed slot 7 from the list
> [ 55.510639] acpiphp: release_slot - physical_slot = 7
> [ 55.511838] pci_bus 0000:00: dev 07, dec refcount to 0
> [ 55.513117] pci_bus 0000:00: dev 07, released physical slot 7
> [ 55.514496] acpiphp: Slot [6] unregistered
> [ 55.515486] pci_hotplug: pci_hp_deregister: Removed slot 6 from the list
> [ 55.517099] acpiphp: release_slot - physical_slot = 6
> [ 55.518283] pci_bus 0000:00: dev 06, dec refcount to 0
> [ 55.519504] pci_bus 0000:00: dev 06, released physical slot 6
> [ 55.520365] acpiphp: Slot [5] unregistered
> [ 55.522045] pci_hotplug: pci_hp_deregister: Removed slot 5 from the list
> [ 55.523383] acpiphp: release_slot - physical_slot = 5
> [ 55.524627] pci_bus 0000:00: dev 05, dec refcount to 0
> [ 55.525887] pci_bus 0000:00: dev 05, released physical slot 5
> [ 55.527122] acpiphp: Slot [4] unregistered
> [ 55.527770] pci_hotplug: pci_hp_deregister: Removed slot 4 from the list
> [ 55.529417] acpiphp: release_slot - physical_slot = 4
> [ 55.530620] pci_bus 0000:00: dev 04, dec refcount to 0
> [ 55.531912] pci_bus 0000:00: dev 04, released physical slot 4
> [ 55.533325] acpiphp: Slot [3] unregistered
> [ 55.534327] pci_hotplug: pci_hp_deregister: Removed slot 3 from the list
> [ 55.535915] acpiphp: release_slot - physical_slot = 3
> [ 55.537147] pci_bus 0000:00: dev 03, dec refcount to 0
> [ 55.538388] pci_bus 0000:00: dev 03, released physical slot 3
> [ 55.539763] acpi_pci_iommu_remove is called for \_SB_.PCI0 ffff8801964661e0
> [ 55.541569] acpi_pci_ioapic_remove is called for \_SB_.PCI0
> ffff8801964661e0
> [ 55.543356] ACPI: Delete PCI Interrupt Routing Table for 0000:00
> [ 55.544848] pci 0000:00:00.0: freeing pci_dev info
> [ 55.546002] pci 0000:00:01.0: freeing pci_dev info
> [ 55.547148] pci 0000:00:01.1: freeing pci_dev info
> [ 55.548304] pci 0000:00:01.3: freeing pci_dev info
> [ 55.549346] pci 0000:00:02.0: freeing pci_dev info
> [ 55.550058] pci 0000:00:03.0: freeing pci_dev info
> [ 55.550707] pci_bus 0000:00: busn_res: [bus 00-ff] is released
> [ 55.552535] pci_bus 0000:00: freeing pci_bus info
> [ 55.553424] pci_host_bridge pci0000:00: freeing pci_host_bridge info
> [ 55.555303] BUG: unable to handle kernel NULL pointer dereference
> at (null)
> [ 55.556269] IP: [<ffffffff8153bf9a>] acpi_power_resources_list_free+0x15/0x3f
> [ 55.556269] PGD 0
> [ 55.556269] Oops: 0000 [#1] SMP
> [ 55.556269] Modules linked in:
> [ 55.556269] CPU 0
> [ 55.556269] Pid: 1036, comm: kworker/0:1 Not tainted
> 3.8.0-rc3-yh-00703-gf602aca-dirty #1131 Bochs Bochs
> [ 55.556269] RIP: 0010:[<ffffffff8153bf9a>] [<ffffffff8153bf9a>]
> acpi_power_resources_list_free+0x15/0x3f
> [ 55.556269] RSP: 0018:ffff8801962479b8 EFLAGS: 00010292
> [ 55.556269] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000006
> [ 55.556269] RDX: 00000000000033a0 RSI: ffff8801960c2e18 RDI: ffff8801965db988
> [ 55.556269] RBP: ffff8801962479d8 R08: 0000000000000002 R09: 0000000000000000
> [ 55.556269] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
> [ 55.556269] R13: ffff8801965db988 R14: ffff8801965db9e0 R15: ffff880196466528
> [ 55.556269] FS: 0000000000000000(0000) GS:ffff880199200000(0000)
> knlGS:0000000000000000
> [ 55.556269] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> [ 55.556269] CR2: 0000000000000000 CR3: 0000000002c13000 CR4: 00000000000006f0
> [ 55.556269] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [ 55.556269] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> [ 55.556269] Process kworker/0:1 (pid: 1036, threadinfo
> ffff880196246000, task ffff8801960c2500)
> [ 55.556269] Stack:
> [ 55.556269] 0000000000000000 ffff8801965db800 0000000000000000
> ffff8801965db9d0
> [ 55.556269] ffff880196247a08 ffffffff81536e2f ffffffff81536dff
> ffff8801965db9e0
> [ 55.556269] ffff8801965db9d0 ffff88019666de00 ffff880196247a38
> ffffffff81710385
> [ 55.556269] Call Trace:
> [ 55.556269] [<ffffffff81536e2f>] acpi_device_release+0x30/0x6a
> [ 55.556269] [<ffffffff81536dff>] ? acpi_free_ids+0x50/0x50
> [ 55.556269] [<ffffffff81710385>] device_release+0xa5/0x110
> [ 55.556269] [<ffffffff814bda7f>] kobject_release+0x6f/0x90
> [ 55.556269] [<ffffffff814bd93c>] kobject_put+0x4c/0x60
> [ 55.556269] [<ffffffff81710087>] put_device+0x17/0x20
> [ 55.556269] [<ffffffff8171133e>] device_unregister+0x1e/0x30
> [ 55.556269] [<ffffffff815367ed>] acpi_device_unregister+0x162/0x177
> [ 55.556269] [<ffffffff8153682d>] acpi_bus_remove+0x2b/0x2f
> [ 55.556269] [<ffffffff815601c4>] acpi_ns_walk_namespace+0x114/0x250
> [ 55.556269] [<ffffffff81536802>] ? acpi_device_unregister+0x177/0x177
> [ 55.556269] [<ffffffff81536802>] ? acpi_device_unregister+0x177/0x177
> [ 55.556269] [<ffffffff815607c5>] acpi_walk_namespace+0xee/0x137
> [ 55.556269] [<ffffffff81536921>] acpi_bus_trim+0x64/0x7c
> [ 55.556269] [<ffffffff815369b2>] acpi_bus_hot_remove_device+0x79/0x16d
> [ 55.556269] [<ffffffff81196dc2>] ? kmem_cache_alloc_trace+0x42/0x150
> [ 55.556269] [<ffffffff81539c18>] _handle_hotplug_event_root+0x108/0x149
> [ 55.556269] [<ffffffff810a8b20>] ? process_one_work+0x270/0x560
> [ 55.556269] [<ffffffff810a8b8d>] process_one_work+0x2dd/0x560
> [ 55.556269] [<ffffffff810a8b20>] ? process_one_work+0x270/0x560
> [ 55.556269] [<ffffffff810a9679>] ? worker_thread+0x59/0x3a0
> [ 55.556269] [<ffffffff81539b10>] ? acpi_pci_find_root+0x3f/0x3f
> [ 55.556269] [<ffffffff810a989a>] worker_thread+0x27a/0x3a0
> [ 55.556269] [<ffffffff810e9f4d>] ? trace_hardirqs_on+0xd/0x10
> [ 55.556269] [<ffffffff810a9620>] ? manage_workers+0x280/0x280
> [ 55.556269] [<ffffffff810af088>] kthread+0xe8/0xf0
> [ 55.556269] [<ffffffff810aefa0>] ? __init_kthread_worker+0x70/0x70
> [ 55.556269] [<ffffffff8216d61c>] ret_from_fork+0x7c/0xb0
> [ 55.556269] [<ffffffff810aefa0>] ? __init_kthread_worker+0x70/0x70
> [ 55.556269] Code: fe ff ff 48 8b 1b 4c 39 e3 75 ef 5b 5b 41 5c 44
> 89 e8 41 5d 5d c3 0f 1f 44 00 00 55 48 89 e5 41 55 49 89 fd 41 54 53
> 50 48 8b 1f <4c> 8b 23 eb 17 48 89 df e8 c9 34 f9 ff 48 89 df 4c 89 e3
> e8 6e
>
>
> looks like:
>
> acpi_device_release+0x30
> 0xffffffff81536e2f is in acpi_device_release (drivers/acpi/scan.c:524).
> 519 static void acpi_free_power_resources_lists(struct acpi_device *device)
> 520 {
> 521 int i;
> 522
> 523 acpi_power_resources_list_free(&device->wakeup.resources);
> 524 if (!device->flags.power_manageable)
> 525 return;
> 526
> 527 for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) {
> 528 struct acpi_device_power_state *ps = &device->power.states[i];
>
> wakeup.resources has problem?
Yes, it seems to.
Thanks for the report, looking into it.
Rafael
--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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