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Date: Fri, 25 Jul 2008 00:49:26 +0200
From: Pierre Ossman <drzeus-list@...eus.cx>
To: Alex Chiang <achiang@...com>
Cc: Jesse Barnes <jbarnes@...tuousgeek.org>,
Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>,
LKML <linux-kernel@...r.kernel.org>, linux-pci@...r.kernel.org
Subject: Re: post 2.6.26 requires pciehp_slot_with_bus
On Thu, 24 Jul 2008 16:29:14 -0600
Alex Chiang <achiang@...com> wrote:
> * Jesse Barnes <jbarnes@...tuousgeek.org>:
> >
> > Theoretically only one of the other hotplug drivers could claim
> > the slot (e.g. acpi, cpci, cpqhp, fakephp etc.). You could
> > put a dump_stack() or something into
> > drivers/pci/hotplug/pci_hotplug_core.c:pci_hp_register to see
> > if we're getting multiple callers on the same slot for some
> > reason... Maybe the pciehp driver itself is trying to register
> > the same slot twice?
>
> This is a good idea.
>
> Any chance you could get that debug info for us, Pierre?
>
I aim to please. Following is the relevant lines from my bootup with a
dump_stack() right at the beginning of pci_hp_register():
[ 1.247459] pcieport-driver 0000:00:01.0: found MSI capability
[ 1.247523] pci_express 0000:00:01.0:pcie00: allocate port service
[ 1.247632] pci_express 0000:00:01.0:pcie02: allocate port service
[ 1.247741] pci_express 0000:00:01.0:pcie03: allocate port service
[ 1.248010] PCI: Setting latency timer of device 0000:00:1c.0 to 64
[ 1.248158] pcieport-driver 0000:00:1c.0: found MSI capability
[ 1.248299] pci_express 0000:00:1c.0:pcie00: allocate port service
[ 1.248415] pci_express 0000:00:1c.0:pcie02: allocate port service
[ 1.248524] pci_express 0000:00:1c.0:pcie03: allocate port service
[ 1.248873] PCI: Setting latency timer of device 0000:00:1c.1 to 64
[ 1.249020] pcieport-driver 0000:00:1c.1: found MSI capability
[ 1.249162] pci_express 0000:00:1c.1:pcie00: allocate port service
[ 1.249270] pci_express 0000:00:1c.1:pcie02: allocate port service
[ 1.249379] pci_express 0000:00:1c.1:pcie03: allocate port service
[ 1.249708] PCI: Setting latency timer of device 0000:00:1c.2 to 64
[ 1.249855] pcieport-driver 0000:00:1c.2: found MSI capability
[ 1.249995] pci_express 0000:00:1c.2:pcie00: allocate port service
[ 1.250102] pci_express 0000:00:1c.2:pcie02: allocate port service
[ 1.250211] pci_express 0000:00:1c.2:pcie03: allocate port service
[ 1.250531] PCI: Setting latency timer of device 0000:00:1c.3 to 64
[ 1.250679] pcieport-driver 0000:00:1c.3: found MSI capability
[ 1.250819] pci_express 0000:00:1c.3:pcie00: allocate port service
[ 1.250927] pci_express 0000:00:1c.3:pcie02: allocate port service
[ 1.251035] pci_express 0000:00:1c.3:pcie03: allocate port service
[ 1.251361] PCI: Setting latency timer of device 0000:00:1c.4 to 64
[ 1.251508] pcieport-driver 0000:00:1c.4: found MSI capability
[ 1.251649] pci_express 0000:00:1c.4:pcie00: allocate port service
[ 1.251762] pci_express 0000:00:1c.4:pcie02: allocate port service
[ 1.251894] pci_express 0000:00:1c.4:pcie03: allocate port service
[ 1.252429] pci_hotplug: PCI Hot Plug PCI Core version: 0.5
[ 1.253405] pciehp: HPC vendor_id 8086 device_id 2a01 ss_vid 0 ss_did 0
[ 1.253453] Pid: 1, comm: swapper Not tainted 2.6.26 #110
[ 1.253460] [<c0544545>] pci_hp_register+0x25/0x4b0
[ 1.253475] [<c0545e3e>] ? get_adapter_status+0x2e/0x70
[ 1.253485] [<c05462ad>] ? pciehp_probe+0xbd/0x3f0
[ 1.253494] [<c054631b>] pciehp_probe+0x12b/0x3f0
[ 1.253502] [<c04e8b58>] ? sysfs_add_one+0x18/0x50
[ 1.253513] [<c04e9a94>] ? sysfs_do_create_link+0xa4/0x140
[ 1.253523] [<c0542110>] pcie_port_probe_service+0x50/0x90
[ 1.253531] [<c04e9b67>] ? sysfs_create_link+0x17/0x20
[ 1.253540] [<c059f42d>] ? driver_sysfs_add+0x5d/0x90
[ 1.253550] [<c059f557>] driver_probe_device+0x87/0x1a0
[ 1.253557] [<c066f841>] ? _spin_lock_irqsave+0x21/0x40
[ 1.253569] [<c066fb66>] ? _spin_unlock_irqrestore+0x16/0x40
[ 1.253578] [<c059f6e9>] __driver_attach+0x79/0x80
[ 1.253585] [<c059ee23>] bus_for_each_dev+0x53/0x80
[ 1.253593] [<c059f3ce>] driver_attach+0x1e/0x20
[ 1.253600] [<c059f670>] ? __driver_attach+0x0/0x80
[ 1.253608] [<c059e7e7>] bus_add_driver+0x1b7/0x230
[ 1.253615] [<c059f8be>] driver_register+0x6e/0x150
[ 1.253622] [<c059f8be>] ? driver_register+0x6e/0x150
[ 1.253630] [<c054202f>] pcie_port_service_register+0x3f/0x50
[ 1.253638] [<c07a7b52>] pcied_init+0x16/0x83
[ 1.253648] [<c07a7b38>] ? pci_hotplug_init+0x1f/0x23
[ 1.253657] [<c078b417>] kernel_init+0x1ad/0x2b8
[ 1.253666] [<c04ae774>] ? sys_select+0x44/0x1a0
[ 1.253676] [<c07a7b3c>] ? pcied_init+0x0/0x83
[ 1.253685] [<c042337f>] ? schedule_tail+0x1f/0x50
[ 1.253695] [<c0403e72>] ? ret_from_fork+0x6/0x1c
[ 1.253704] [<c078b26a>] ? kernel_init+0x0/0x2b8
[ 1.253712] [<c078b26a>] ? kernel_init+0x0/0x2b8
[ 1.253720] [<c0404b9b>] kernel_thread_helper+0x7/0x10
[ 1.253728] =======================
[ 1.253841] hpdriver 0000:00:01.0:pcie02: service driver hpdriver loaded
[ 1.254648] pciehp: HPC vendor_id 8086 device_id 283f ss_vid 0 ss_did 0
[ 1.254730] Pid: 1, comm: swapper Not tainted 2.6.26 #110
[ 1.254735] [<c0544545>] pci_hp_register+0x25/0x4b0
[ 1.254744] [<c0545e3e>] ? get_adapter_status+0x2e/0x70
[ 1.254754] [<c05462ad>] ? pciehp_probe+0xbd/0x3f0
[ 1.254763] [<c054631b>] pciehp_probe+0x12b/0x3f0
[ 1.254771] [<c04e8b58>] ? sysfs_add_one+0x18/0x50
[ 1.254780] [<c04e9a94>] ? sysfs_do_create_link+0xa4/0x140
[ 1.254789] [<c0542110>] pcie_port_probe_service+0x50/0x90
[ 1.254797] [<c04e9b67>] ? sysfs_create_link+0x17/0x20
[ 1.254806] [<c059f42d>] ? driver_sysfs_add+0x5d/0x90
[ 1.254814] [<c059f557>] driver_probe_device+0x87/0x1a0
[ 1.254821] [<c066f841>] ? _spin_lock_irqsave+0x21/0x40
[ 1.254830] [<c066fb66>] ? _spin_unlock_irqrestore+0x16/0x40
[ 1.254838] [<c059f6e9>] __driver_attach+0x79/0x80
[ 1.254845] [<c059ee23>] bus_for_each_dev+0x53/0x80
[ 1.254853] [<c059f3ce>] driver_attach+0x1e/0x20
[ 1.254859] [<c059f670>] ? __driver_attach+0x0/0x80
[ 1.254867] [<c059e7e7>] bus_add_driver+0x1b7/0x230
[ 1.254874] [<c059f8be>] driver_register+0x6e/0x150
[ 1.254881] [<c059f8be>] ? driver_register+0x6e/0x150
[ 1.254889] [<c054202f>] pcie_port_service_register+0x3f/0x50
[ 1.254897] [<c07a7b52>] pcied_init+0x16/0x83
[ 1.254905] [<c07a7b38>] ? pci_hotplug_init+0x1f/0x23
[ 1.254914] [<c078b417>] kernel_init+0x1ad/0x2b8
[ 1.254922] [<c04ae774>] ? sys_select+0x44/0x1a0
[ 1.254930] [<c07a7b3c>] ? pcied_init+0x0/0x83
[ 1.254939] [<c042337f>] ? schedule_tail+0x1f/0x50
[ 1.254948] [<c0403e72>] ? ret_from_fork+0x6/0x1c
[ 1.254956] [<c078b26a>] ? kernel_init+0x0/0x2b8
[ 1.254964] [<c078b26a>] ? kernel_init+0x0/0x2b8
[ 1.254972] [<c0404b9b>] kernel_thread_helper+0x7/0x10
[ 1.254980] =======================
[ 1.255097] hpdriver 0000:00:1c.0:pcie02: service driver hpdriver loaded
[ 1.255900] pciehp: HPC vendor_id 8086 device_id 2841 ss_vid 0 ss_did 0
[ 1.255989] Pid: 1, comm: swapper Not tainted 2.6.26 #110
[ 1.255994] [<c0544545>] pci_hp_register+0x25/0x4b0
[ 1.256004] [<c0545e3e>] ? get_adapter_status+0x2e/0x70
[ 1.256013] [<c05462ad>] ? pciehp_probe+0xbd/0x3f0
[ 1.256023] [<c054631b>] pciehp_probe+0x12b/0x3f0
[ 1.256030] [<c04e8b58>] ? sysfs_add_one+0x18/0x50
[ 1.256040] [<c04e9a94>] ? sysfs_do_create_link+0xa4/0x140
[ 1.256049] [<c0542110>] pcie_port_probe_service+0x50/0x90
[ 1.256057] [<c04e9b67>] ? sysfs_create_link+0x17/0x20
[ 1.256066] [<c059f42d>] ? driver_sysfs_add+0x5d/0x90
[ 1.256074] [<c059f557>] driver_probe_device+0x87/0x1a0
[ 1.256082] [<c066f841>] ? _spin_lock_irqsave+0x21/0x40
[ 1.256092] [<c066fb66>] ? _spin_unlock_irqrestore+0x16/0x40
[ 1.256100] [<c059f6e9>] __driver_attach+0x79/0x80
[ 1.256107] [<c059ee23>] bus_for_each_dev+0x53/0x80
[ 1.256114] [<c059f3ce>] driver_attach+0x1e/0x20
[ 1.256121] [<c059f670>] ? __driver_attach+0x0/0x80
[ 1.256129] [<c059e7e7>] bus_add_driver+0x1b7/0x230
[ 1.256136] [<c059f8be>] driver_register+0x6e/0x150
[ 1.256143] [<c059f8be>] ? driver_register+0x6e/0x150
[ 1.256151] [<c054202f>] pcie_port_service_register+0x3f/0x50
[ 1.256159] [<c07a7b52>] pcied_init+0x16/0x83
[ 1.256167] [<c07a7b38>] ? pci_hotplug_init+0x1f/0x23
[ 1.256176] [<c078b417>] kernel_init+0x1ad/0x2b8
[ 1.256184] [<c04ae774>] ? sys_select+0x44/0x1a0
[ 1.256192] [<c07a7b3c>] ? pcied_init+0x0/0x83
[ 1.256201] [<c042337f>] ? schedule_tail+0x1f/0x50
[ 1.256209] [<c0403e72>] ? ret_from_fork+0x6/0x1c
[ 1.256218] [<c078b26a>] ? kernel_init+0x0/0x2b8
[ 1.256226] [<c078b26a>] ? kernel_init+0x0/0x2b8
[ 1.256234] [<c0404b9b>] kernel_thread_helper+0x7/0x10
[ 1.256242] =======================
[ 1.256355] hpdriver 0000:00:1c.1:pcie02: service driver hpdriver loaded
[ 1.257191] pciehp: HPC vendor_id 8086 device_id 2843 ss_vid 0 ss_did 0
[ 1.257273] Pid: 1, comm: swapper Not tainted 2.6.26 #110
[ 1.257278] [<c0544545>] pci_hp_register+0x25/0x4b0
[ 1.257287] [<c0545e3e>] ? get_adapter_status+0x2e/0x70
[ 1.257297] [<c05462ad>] ? pciehp_probe+0xbd/0x3f0
[ 1.257306] [<c054631b>] pciehp_probe+0x12b/0x3f0
[ 1.257313] [<c04e8b58>] ? sysfs_add_one+0x18/0x50
[ 1.257323] [<c04e9a94>] ? sysfs_do_create_link+0xa4/0x140
[ 1.257332] [<c0542110>] pcie_port_probe_service+0x50/0x90
[ 1.257340] [<c04e9b67>] ? sysfs_create_link+0x17/0x20
[ 1.257349] [<c059f42d>] ? driver_sysfs_add+0x5d/0x90
[ 1.257358] [<c059f557>] driver_probe_device+0x87/0x1a0
[ 1.257365] [<c066f841>] ? _spin_lock_irqsave+0x21/0x40
[ 1.257374] [<c066fb66>] ? _spin_unlock_irqrestore+0x16/0x40
[ 1.257383] [<c059f6e9>] __driver_attach+0x79/0x80
[ 1.257390] [<c059ee23>] bus_for_each_dev+0x53/0x80
[ 1.257397] [<c059f3ce>] driver_attach+0x1e/0x20
[ 1.257403] [<c059f670>] ? __driver_attach+0x0/0x80
[ 1.257411] [<c059e7e7>] bus_add_driver+0x1b7/0x230
[ 1.257419] [<c059f8be>] driver_register+0x6e/0x150
[ 1.257426] [<c059f8be>] ? driver_register+0x6e/0x150
[ 1.257434] [<c054202f>] pcie_port_service_register+0x3f/0x50
[ 1.257442] [<c07a7b52>] pcied_init+0x16/0x83
[ 1.257450] [<c07a7b38>] ? pci_hotplug_init+0x1f/0x23
[ 1.257459] [<c078b417>] kernel_init+0x1ad/0x2b8
[ 1.257467] [<c04ae774>] ? sys_select+0x44/0x1a0
[ 1.257475] [<c07a7b3c>] ? pcied_init+0x0/0x83
[ 1.257484] [<c042337f>] ? schedule_tail+0x1f/0x50
[ 1.257492] [<c0403e72>] ? ret_from_fork+0x6/0x1c
[ 1.257500] [<c078b26a>] ? kernel_init+0x0/0x2b8
[ 1.257509] [<c078b26a>] ? kernel_init+0x0/0x2b8
[ 1.257517] [<c0404b9b>] kernel_thread_helper+0x7/0x10
[ 1.257524] =======================
[ 1.257639] hpdriver 0000:00:1c.2:pcie02: service driver hpdriver loaded
[ 1.258440] pciehp: HPC vendor_id 8086 device_id 2845 ss_vid 0 ss_did 0
[ 1.258522] Pid: 1, comm: swapper Not tainted 2.6.26 #110
[ 1.258527] [<c0544545>] pci_hp_register+0x25/0x4b0
[ 1.258537] [<c0545e3e>] ? get_adapter_status+0x2e/0x70
[ 1.258546] [<c05462ad>] ? pciehp_probe+0xbd/0x3f0
[ 1.258556] [<c054631b>] pciehp_probe+0x12b/0x3f0
[ 1.258564] [<c04e8b58>] ? sysfs_add_one+0x18/0x50
[ 1.258573] [<c04e9a94>] ? sysfs_do_create_link+0xa4/0x140
[ 1.258583] [<c0542110>] pcie_port_probe_service+0x50/0x90
[ 1.258591] [<c04e9b67>] ? sysfs_create_link+0x17/0x20
[ 1.258600] [<c059f42d>] ? driver_sysfs_add+0x5d/0x90
[ 1.258609] [<c059f557>] driver_probe_device+0x87/0x1a0
[ 1.258616] [<c066f841>] ? _spin_lock_irqsave+0x21/0x40
[ 1.258626] [<c066fb66>] ? _spin_unlock_irqrestore+0x16/0x40
[ 1.258634] [<c059f6e9>] __driver_attach+0x79/0x80
[ 1.258642] [<c059ee23>] bus_for_each_dev+0x53/0x80
[ 1.258649] [<c059f3ce>] driver_attach+0x1e/0x20
[ 1.258656] [<c059f670>] ? __driver_attach+0x0/0x80
[ 1.258665] [<c059e7e7>] bus_add_driver+0x1b7/0x230
[ 1.258672] [<c059f8be>] driver_register+0x6e/0x150
[ 1.258679] [<c059f8be>] ? driver_register+0x6e/0x150
[ 1.258687] [<c054202f>] pcie_port_service_register+0x3f/0x50
[ 1.258695] [<c07a7b52>] pcied_init+0x16/0x83
[ 1.258703] [<c07a7b38>] ? pci_hotplug_init+0x1f/0x23
[ 1.258712] [<c078b417>] kernel_init+0x1ad/0x2b8
[ 1.258719] [<c04ae774>] ? sys_select+0x44/0x1a0
[ 1.258728] [<c07a7b3c>] ? pcied_init+0x0/0x83
[ 1.258737] [<c042337f>] ? schedule_tail+0x1f/0x50
[ 1.258745] [<c0403e72>] ? ret_from_fork+0x6/0x1c
[ 1.258753] [<c078b26a>] ? kernel_init+0x0/0x2b8
[ 1.258761] [<c078b26a>] ? kernel_init+0x0/0x2b8
[ 1.258769] [<c0404b9b>] kernel_thread_helper+0x7/0x10
[ 1.258777] =======================
[ 1.258893] hpdriver 0000:00:1c.3:pcie02: service driver hpdriver loaded
[ 1.259701] pciehp: HPC vendor_id 8086 device_id 2847 ss_vid 0 ss_did 0
[ 1.259787] Pid: 1, comm: swapper Not tainted 2.6.26 #110
[ 1.259791] [<c0544545>] pci_hp_register+0x25/0x4b0
[ 1.259801] [<c0545e3e>] ? get_adapter_status+0x2e/0x70
[ 1.259810] [<c05462ad>] ? pciehp_probe+0xbd/0x3f0
[ 1.259819] [<c054631b>] pciehp_probe+0x12b/0x3f0
[ 1.259827] [<c04e8b58>] ? sysfs_add_one+0x18/0x50
[ 1.259836] [<c04e9a94>] ? sysfs_do_create_link+0xa4/0x140
[ 1.259845] [<c0542110>] pcie_port_probe_service+0x50/0x90
[ 1.259853] [<c04e9b67>] ? sysfs_create_link+0x17/0x20
[ 1.259862] [<c059f42d>] ? driver_sysfs_add+0x5d/0x90
[ 1.259870] [<c059f557>] driver_probe_device+0x87/0x1a0
[ 1.259877] [<c066f841>] ? _spin_lock_irqsave+0x21/0x40
[ 1.259886] [<c066fb66>] ? _spin_unlock_irqrestore+0x16/0x40
[ 1.259894] [<c059f6e9>] __driver_attach+0x79/0x80
[ 1.259901] [<c059ee23>] bus_for_each_dev+0x53/0x80
[ 1.259908] [<c059f3ce>] driver_attach+0x1e/0x20
[ 1.259915] [<c059f670>] ? __driver_attach+0x0/0x80
[ 1.259923] [<c059e7e7>] bus_add_driver+0x1b7/0x230
[ 1.259930] [<c059f8be>] driver_register+0x6e/0x150
[ 1.259937] [<c059f8be>] ? driver_register+0x6e/0x150
[ 1.259945] [<c054202f>] pcie_port_service_register+0x3f/0x50
[ 1.259954] [<c07a7b52>] pcied_init+0x16/0x83
[ 1.259962] [<c07a7b38>] ? pci_hotplug_init+0x1f/0x23
[ 1.259971] [<c078b417>] kernel_init+0x1ad/0x2b8
[ 1.259978] [<c04ae774>] ? sys_select+0x44/0x1a0
[ 1.259987] [<c07a7b3c>] ? pcied_init+0x0/0x83
[ 1.259996] [<c042337f>] ? schedule_tail+0x1f/0x50
[ 1.260004] [<c0403e72>] ? ret_from_fork+0x6/0x1c
[ 1.260012] [<c078b26a>] ? kernel_init+0x0/0x2b8
[ 1.260020] [<c078b26a>] ? kernel_init+0x0/0x2b8
[ 1.260028] [<c0404b9b>] kernel_thread_helper+0x7/0x10
[ 1.260036] =======================
[ 1.260041] pciehp: pci_hp_register failed with error -17
[ 1.260176] pciehp: Failed to register slot because of name collision. Try 'pciehp_slot_with_bus' module option.
[ 1.260318] pciehp: pciehp: slot initialization failed
[ 1.260576] pciehp: PCI Express Hot Plug Controller Driver version: 0.4
--
-- Pierre Ossman
Linux kernel, MMC maintainer http://www.kernel.org
rdesktop, core developer http://www.rdesktop.org
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