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* PCI: fix rpadlpar pci hotplug driver sysfs usageBenjamin Herrenschmidt2008-05-301-2/+6
| | | | | | | | | | | When Greg "fixed" the sysfs usage of that driver a while back, he seem to have introduced a bug where the quotes are added around the name of our specific sysfs files, thus breaking the user space tool. This fixes it. Tested DLPAR operations on a POWER6 machine successfully. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* pciehp: add message about pciehp_slot_with_bus optionKenji Kaneshige2008-05-281-1/+5
| | | | | | | | | | | | | Some (broken?) platform assign the same slot name to multiple hotplug slots. On such system, slot initialization would fail because of name collision. The pciehp driver already have a "slot_with_bus" module option which adds the bus number into the slot name. This patch adds the message about this module option that will be displayed when slot name collision is detected. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* pci hotplug core: add check of duplicate slot nameKenji Kaneshige2008-05-281-1/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix the following errors reported by Jan C. Nordholz in http://bugzilla.kernel.org/show_bug.cgi?id=10751. kobject_add_internal failed for 2 with -EEXIST, don't try to register things with the same name in the same directory. Pid: 1, comm: swapper Tainted: G W 2.6.26-rc3 #1 [<c0266980>] kobject_add_internal+0x140/0x190 [<c0266afd>] kobject_init_and_add+0x2d/0x40 [<c027bc91>] pci_hp_register+0x81/0x2f0 [<c027fd07>] pciehp_probe+0x1a7/0x470 [<c01b3b84>] sysfs_add_one+0x44/0xa0 [<c01b3c1f>] sysfs_addrm_start+0x3f/0xb0 [<c01b497a>] sysfs_create_link+0x8a/0xf0 [<c0279570>] pcie_port_probe_service+0x50/0x80 [<c02e0545>] driver_sysfs_add+0x55/0x70 [<c02e0662>] driver_probe_device+0x82/0x180 [<c02e07cc>] __driver_attach+0x6c/0x70 [<c02dfe0a>] bus_for_each_dev+0x3a/0x60 [<c05db2d0>] pcied_init+0x0/0x80 [<c02e04e6>] driver_attach+0x16/0x20 [<c02e0760>] __driver_attach+0x0/0x70 [<c02e0341>] bus_add_driver+0x1a1/0x220 [<c05db2d0>] pcied_init+0x0/0x80 [<c02e09cd>] driver_register+0x4d/0x120 [<c05db050>] ibm_acpiphp_init+0x0/0x190 [<c0125aab>] printk+0x1b/0x20 [<c05db2d0>] pcied_init+0x0/0x80 [<c05db2de>] pcied_init+0xe/0x80 [<c05c751a>] kernel_init+0x10a/0x300 [<c0120138>] schedule_tail+0x18/0x50 [<c0103b9a>] ret_from_fork+0x6/0x1c [<c05c7410>] kernel_init+0x0/0x300 [<c05c7410>] kernel_init+0x0/0x300 [<c010485b>] kernel_thread_helper+0x7/0x1c ======================= pci_hotplug: Unable to register kobject '2'<3>pciehp: pci_hp_register failed with error -22 Slot with the same name can be registered multiple times if shpchp or pciehp driver is loaded after acpiphp is loaded because ACPI based hotplug driver and Native OS hotplug driver trying to handle the same physical slot. In this case, current pci_hotplug core will call kobject_init_and_add() muliple time with the same name. This is the cause of this problem. To fix this problem, this patch adds the check into pci_hp_register() to see if the slot with the same name. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* pciehp: move msleep after power offKenji Kaneshige2008-05-282-7/+14
| | | | | | | | | | | | | | | | | According to the PCI Express specification, we must wait for at least 1 second after turning power off before taking any action that relies on power having been removed from the slot/adapter. For this, current pciehp wait for 1 second after issuing the power off command in hpc_power_off_slot() function. But waiting for 1 second in hpc_power_off_slot() can make pciehp probing slow-down because pciehp probe code calls hpc_power_off_slot() if the slot is not occupied just in case. We don't need to wait for 1 second at the pciehp probe time because there is no action on that empty slot. So move 1 second wait from hpc_power_off_slot() to the caller of hpc_power_off_slot(). Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* pciehp: poll cmd completion if hotplug interrupt is disabledKenji Kaneshige2008-05-281-4/+38
| | | | | | | | | | | | | | | | | | Fix improper long wait for command completion in pciehp probing. As described in PCI Express specification, software notification is not generated if the command that occurs as a result of a write to the Slot Control register that disables software notification of command completed events. Since pciehp driver doesn't take it into account, such command is issued in pciehp probing, and it causes improper long wait for command completion. This patch changes the pciehp driver to take such command into account. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* pciehp: fix slow probingKenji Kaneshige2008-05-282-7/+36
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix the "pciehp probing slow" problem reported from Jan C. Nordholz in http://bugzilla.kernel.org/show_bug.cgi?id=10751. The command completed bit in Slot Status register applies only to commands issued to control the attention indicator, power indicator, power controller, or electromechanical interlock. However, writes to other parts of the Slot Control register would end up writing to the control fields. Hence, any write to Slot Control register is considered as a command. However, if the controller doesn't support any of attention indicator, power indicator, power controller and electromechanical interlock, command completed bit would not set in writing to Slot Control register. In this case, we should not wait for command completed bit set, otherwise all commands would be considered not completed in timeout seconds (1 sec.). The cause of the problem is pciehp driver didn't take this situation into account. This patch changes pciehp to take it into account. This patch also add the check for "No Command Completed Support" bit in Slot Capability register. If it is set, we should not wait for command completed bit set as well. This problem seems to be revealed by the commit c27fb883dffe11aa4cb35ecea1fa1832ba45d4da that fixed the bug that pciehp did not wait for command completed properly (pciehp just ignored the command completion event). Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* pciehp: fix NULL dereference in interrupt handlerKenji Kaneshige2008-05-283-35/+37
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix the following NULL dereference problem reported from Pierre Ossman and Ingo Molnar. pciehp: HPC vendor_id 8086 device_id 27d0 ss_vid 0 ss_did 0 pciehp: pciehp_find_slot: slot (device=0x0) not found BUG: unable to handle kernel NULL pointer dereference at 0000000000000070 IP: [<ffffffff80494a8b>] pciehp_handle_presence_change+0x7e/0x113 PGD 0 Oops: 0000 [1] CPU 0 Modules linked in: Pid: 1, comm: swapper Tainted: G W 2.6.26-rc3-sched-devel.git-00001-g2b99b26-dirty #170 RIP: 0010:[<ffffffff80494a8b>] [<ffffffff80494a8b>] pciehp_handle_presence_change+0x7e/0x113 RSP: 0000:ffff81003f83fbb0 EFLAGS: 00010046 RAX: 0000000000000039 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000046 RBP: ffff81003f83fbd0 R08: 0000000000000001 R09: ffffffff80245103 R10: 0000000000000020 R11: 0000000000000000 R12: ffff81003ea53a30 R13: 0000000000000000 R14: 0000000000000011 R15: ffffffff80495926 FS: 0000000000000000(0000) GS:ffffffff80be7400(0000) knlGS:0000000000000000 CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b CR2: 0000000000000070 CR3: 0000000000201000 CR4: 00000000000006a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process swapper (pid: 1, threadinfo ffff81003f83e000, task ffff81003f840000) Stack: 0000000000000008 ffff81003f83fbf6 ffff81003ea53a30 0000000000000008 ffff81003f83fc10 ffffffff80495ab4 0000000000000011 0000000000000002 0000000000000202 0000000000000202 00000000fffffff4 ffff81003ea53a30 Call Trace: [<ffffffff80495ab4>] pcie_isr+0x18e/0x1bc [<ffffffff80260831>] request_irq+0x106/0x12f [<ffffffff80495fb6>] pcie_init+0x15e/0x6cc [<ffffffff804933a3>] pciehp_probe+0x64/0x541 [<ffffffff8048f4e7>] pcie_port_probe_service+0x4c/0x76 [<ffffffff8054af70>] driver_probe_device+0xd4/0x1f0 [<ffffffff8054b108>] __driver_attach+0x7c/0x7e [<ffffffff8054b08c>] ? __driver_attach+0x0/0x7e [<ffffffff8054a4b6>] bus_for_each_dev+0x53/0x7d [<ffffffff8054ad3c>] driver_attach+0x1c/0x1e [<ffffffff8054a9c2>] bus_add_driver+0xdd/0x25b [<ffffffff80c09d3d>] ? pcied_init+0x0/0x8b [<ffffffff8054b288>] driver_register+0x5f/0x13e [<ffffffff80c09d3d>] ? pcied_init+0x0/0x8b [<ffffffff8048f441>] pcie_port_service_register+0x47/0x49 [<ffffffff80c09d52>] pcied_init+0x15/0x8b [<ffffffff80bf3938>] kernel_init+0x75/0x243 [<ffffffff808639d2>] ? _spin_unlock_irq+0x2b/0x3a [<ffffffff80228d1f>] ? finish_task_switch+0x57/0x9a [<ffffffff8020c258>] child_rip+0xa/0x12 [<ffffffff8020bcec>] ? restore_args+0x0/0x30 [<ffffffff80bf38c3>] ? kernel_init+0x0/0x243 [<ffffffff8020c24e>] ? child_rip+0x0/0x12 Code: 83 80 00 00 00 48 39 f0 75 e1 0f b6 c9 48 c7 c2 00 0e 8d 80 48 c7 c6 8a 60 a6 80 48 c7 c7 10 db a8 80 31 c0 e8 3f 8d d9 ff 31 db <48> 8b 43 70 48 8d 75 ef 48 89 df ff 50 30 80 7d ef 00 74 37 48 RIP [<ffffffff80494a8b>] pciehp_handle_presence_change+0x7e/0x113 RSP <ffff81003f83fbb0> CR2: 0000000000000070 Kernel panic - not syncing: Fatal exception The situation under which it occurs is hw and timing related: it appears to happen on a system that has PCI hotplug hardware but with no active hotplug cards, and another interrupt in the same (shared) IRQ line arrives too early, before the hotplug-slot entry has been set up - as triggered by CONFIG_DEBUG_SHIRQ=y: This patch contains the following two fixes. (1) Clear all events bits in Slot Status register to prevent the pciehp driver from detecting the spurious events that would have been occur before pciehp loading. (2) Add check whether slot initialization had been already done. This is short term fix. We need more structural fixes to install interrupt handler after slot initialization is done. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* shpchp: add message about shpchp_slot_with_bus optionKenji Kaneshige2008-05-281-0/+4
| | | | | | | | | | | | | Some (broken?) platform assign the same slot name to multiple hotplug slots. On such system, slot initialization would fail because of name collision. The shpchp driver already have a "slot_with_bus" module option which adds the bus number into the slot name. This patch adds the message about this module option that will be displayed when slot name collision is detected. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* pciehp: fix error message about getting hotplug controlKenji Kaneshige2008-04-291-1/+1
| | | | | | | | | | | | | People are confused by the following error message that actually is not for indicating a error. Cannot get control of hotplug hardware for pci %s This patch changes this message to debug message. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jesse Barnes <jbarnes@hobbes.lan>
* pciehp: Fix command writeKenji Kaneshige2008-04-251-1/+4
| | | | | | | | | | | | | Current implementation of pciehp_write_cmd() always enables command completed interrupt. But pciehp_write_cmd() is also used for clearing command completed interrupt enable bit. In this case, we must not set the command completed interrupt enable bit. To fix this bug, this patch add the check to see if caller wants to change command complete interrupt enable bit. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* shpchp: fix slot nameKenji Kaneshige2008-04-251-2/+9
| | | | | | | | | | | | | | | | Current shpchp uses the combination of bus number and slot number as a slot name. But it is not a good idea because bus number is not a physical identifier but a logical identifier. This is against the shpc specification. So remove the bus number from the physical identifier. However, there are some platforms with the problem that it provides the same slot number. For those platforms, this patch also introduces new module option 'shpchp_slot_with_bus'. If it is specified, shpchp uses the combination of bus number and slot number as a slot name. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* make pciehp_acpi_get_hp_hw_control_from_firmware()Adrian Bunk2008-04-251-1/+1
| | | | | | | | | | this_patch_makes_the_needlessly_global_pciehp_acpi_get_hp_hw_control_from_firmware_static ;) Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* pciehp: Clean up pcie_init()Kenji Kaneshige2008-04-251-110/+88
| | | | | | | | | | | | | | Clean up pciehp_ini(). This patch is trying to - Remove redundant capablity checks that were already done in PCIe port bus driver. - Separate the code only for debugging and make debug information easier to read. - Make the entire code easier to read and understand what it is doing. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* pciehp: Mask hotplug interrupt at controller releaseKenji Kaneshige2008-04-251-0/+4
| | | | | | | | | | We must disable hotplug interrupt at controller relase time, otherwise spurious interrupts might happen if any slot events occured (e.g. MRL change) after unloading pciehp driver. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* pciehp: Remove useless hotplug interrupt enablingKenji Kaneshige2008-04-251-46/+8
| | | | | | | | | | Hotplug interrupt is enabled at initialization and nobody clears it. So we need to setup it in each command. This patch removes redundant codes about this. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* pciehp: Fix wrong slot capability checkKenji Kaneshige2008-04-254-39/+39
| | | | | | | | | | | | | | Current pciehp saves only 8bits of Slot Capability registers in ctrl->ctrlcap. But it refers more than 8bit for checking EMI capability. It is clearly a bug and EMI would never work. To fix this problem, this patch saves full Slot Capability contens in ctrl->slot_cap. It also reduce the redundant reads of Slot Capability register. And this pach also cleans up the macros to check the slot capabilitys (e.g. MRL_SENS(), and so on). Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* pciehp: Fix wrong slot control register accessKenji Kaneshige2008-04-251-112/+38
| | | | | | | | | | | Current pciehp implementaion clears hotplug events without waiting for command completion. Because of this, events might not be cleared properly. To prevent this problem, we must use pciehp_write_cmd() to write to Slot Control register. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* pciehp: Add missing memory barrierKenji Kaneshige2008-04-251-0/+2
| | | | | | | | | Fix the possible race condition between pcie_isr() and pciehp_write_cmd() because of the lack of memory barrier. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* pciehp: Fix interrupt event handligKenji Kaneshige2008-04-252-120/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Current pciehp implementation disables and re-enables hotplug interrupts in its interrupt handler. This operation might be intend to guarantee that interrupts for the events newly occured during previous events are being handled will be successfully generated. But current implementaion has the following prolems. - Current interrupt service routin clears status changes without waiting command completion. Because of this, events might not be cleared properly. - Current interrupt service routine clears status changes caused by disabling or enabling hotplug interrupts itself. This will lose new events that occurs during previous interrupts are being handled. - Current implementation doesn't have any serialization mechanism between the code to wait for command completion and the interrupt handler that clears the command completion events caused by itself. There is clearly race conditions between them, and it may cause the problem that waiting for command completion doesn't work for example. To fix those problems, this patch stops disabling/re-enabling hotplug interrupts in interrupt service routine. Instead of this, this patch re-inspects Slot Status register after clearing what is presumed to be the last bending interrupt in order to guarantee that all interrupt events are serviced. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* pciehp: fix slot nameKenji Kaneshige2008-04-251-2/+9
| | | | | | | | | | | | | | | | Current pciehp uses the combination of bus number and slot number as a slot name. But it is not a good idea because bus number is not a physical identifier but a logical identifier. This is against the PCIE specification. So remove the bus number from the physical identifier. However, there are some platforms with the problem that it provides the same slot number. For those platforms, this patch also introduces new module option 'pciehp_slot_with_bus'. If it is specified, pciehp uses the combination of bus number and slot number as a slot name. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* PCI: replace remaining __FUNCTION__ occurrencesHarvey Harrison2008-04-2134-480/+480
| | | | | | | | __FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PCI: Hotplug: fakephp: Return success, not ENODEV, when bus rescan is triggeredTrent Piepho2008-04-211-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The 'power' attribute of the fakephp driver originally only let one turn a slot off. If one tried to turn a slot on (echo 1 > .../power), it would return ENODEV, as fakephp did not support this function. An old (pre-git) patch changed this: 2004/11/11 16:33:31-08:00 jdittmer [PATCH] fakephp: add pci bus rescan ability http://article.gmane.org/gmane.linux.kernel/251183 Now writing "1" to the power attribute has the effect of triggering a bus rescan, but it still returns ENODEV, probably an oversight in the above patch. Using the BusyBox echo will not produce an error message, but will trigger *two* bus rescans (and return an exit code of 1): ~ # strace echo -n 1 > /sys/bus/pci/slots/0000:00:00.0/power ... write(1, "1", 1) = -1 ENODEV (No such device) write(1, "1", 1) = -1 ENODEV (No such device) exit(1) = ? Using cp gives a write error, even though the write did happen and a rescan was triggered: ~ # echo -n 1 > tmp ; cp tmp /sys/bus/pci/slots/0000:00:00.0/power cp: Write Error: No such device It seems much better to return success instead of failure. The actual status of the bus rescan is hard to return. It happens asynchronously in a work thread, so the sysfs store functions returns before any status is ready (the whole point of the work queue). And even if it didn't do this, the rescan doesn't have any clear status to return. Signed-off-by: Trent Piepho <tpiepho@freescale.com> CC: Jan Dittmer <jdittmer@ppp0.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PCI: Hotplug: Fix leaks in IBM Hot Plug Controller Driver - ibmphp_init_devno()Jesper Juhl2008-04-211-1/+5
| | | | | | | | | | | | | | | | In drivers/pci/hotplug/ibmphp_core.c::ibmphp_init_devno() we allocate space dynamically for a PCI irq routing table by calling pcibios_get_irq_routing_table(), but we never free the allocated space. This patch frees the allocated space at the function exit points. Spotted by the Coverity checker. Compile tested only. Please consider applying. Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PCI Hotplug: the ibm driver is not dependant on PCI_LEGACYGreg Kroah-Hartman2008-04-211-1/+1
| | | | | | | | | This was marked incorrectly for some reason. Allow the ibmphp driver to be built even if PCI_LEGACY is not enabled. Cc: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PCI Hotplug: make cpcihp driver use modern apisGreg Kroah-Hartman2008-04-212-2/+8
| | | | | | | | | | | This removes the depandancy of the cpcihp driver from the PCI_LEGACY config option by removing its usage of the pci_find_bus() function. Cc: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Scott Murray <scottm@somanetworks.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* pciehp: don't enable slot unless forcedMark Lord2008-03-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | This fixes a 2.6.25 regression reported by Alex Chiang. Invoke pciehp_enable_slot() at startup only when pciehp_force=1. Some HP equipment apparently cannot cope with it otherwise. This restores the (previously working) 2.6.24 behaviour here, while allowing machines that need a kick to use pciehp_force=1. This was the original design back in October 2007, but Kristen suggested we try without it first: Kristen Carlson Accardi wrote: >I think it would be ok to try allowing the slot to be enabled when not >using pciehp_force mode. We can wrap it later if it proves to break things This ended up breaking one of Alex's setups, so it's time to put the wrapper back in now. Signed-off-by: Mark Lord <mlord@pobox.com> Acked-by: Alex Chiang <achiang@hp.com> Acked-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* PCI Hotplug: Fix small mem leak in IBM Hot Plug Controller DriverJesper Juhl2008-03-111-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | In drivers/pci/hotplug/ibmphp_ebda.c::ebda_rsrc_controller(), storage is allocated with kzalloc() and assigned to 'tmp_slot'. Then lots of stuff, like ->flag, ->supported_speed etc is set in tmp_slot. A bit further down there's then this test : if (!bus_info_ptr1) { rc = -ENODEV; goto error; } At this point, tmp_slot has not been assigned to anything, so when erroring-out we want to free it, but nothing at the 'error:' label free's 'tmp_slot' - and we can't really free 'tmp_slot' at 'error:' since we may jump to that label later when 'tmp_slot' *has* been used and we do not want it freed. So, the only sane option left seems to be to kfree(tmp_slot) just before jumping to the 'error:' label in the one place where this is what actually makes sense. The following patch does just that and thus kills off a tiny potential memory leak. Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* pci: hotplug: pciehp: fix error code path in hpc_power_off_slotKenji Kaneshige2008-03-051-2/+3
| | | | | | | | | | | Fix the error code path in hpc_power_off_slot(). The Bad DLLP Mask bit must be restored before return. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PCI: fix section mismatch warning in pci_scan_child_busSam Ravnborg2008-03-054-4/+4
| | | | | | | | | | | | | | Fix following warning: WARNING: vmlinux.o(.text+0x47bdb1): Section mismatch in reference from the function pci_scan_child_bus() to the function .devinit.text:pcibios_fixup_bus() We had plenty of functions that could be annotated __devinit but due to the former restriction that exported symbols could not be annotated they were not so. So annotate these function and fix the references from the pci/hotplug/* code to silence the resuting warnings. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PCI: don't load acpi_php when acpi is disabledYinghai Lu2008-02-221-0/+6
| | | | | | | | | | | | | | | | | | | When acpi=off and pci=nomsi, don't load acpiphp. Fixes this: pci_hotplug: PCI Hot Plug PCI Core version: 0.5 acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5 ACPI Exception (utmutex-0263): AE_BAD_PARAMETER, Thread FFFF81103CC54000 could not acquire Mutex [1] [20070126] [akpm@linux-foundation.org: export acpi_pci_disabled for acpiphp.ko] [akpm@linux-foundation.org: fix return statement] Signed-off-by: Yinghai Lu <yinghai.lu@sun.com> Cc: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PCI: hotplug: acpiphp_ibm: Remove get device informationGary Hade2008-02-221-16/+17
| | | | | | | | | | | | | | | drivers/pci/hotplug/acpiphp_ibm.c:ibm_find_acpi_device() is not large enough to accommodate data returned by the _CID method executed from acpi_get_object_info(). This patch eliminates the problem by letting ACPI code (instead of driver code) determine and obtain a correctly sized buffer. Signed-off-by: Gary Hade <garyhade@us.ibm.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PCI: Fix fakephp deadlockIan Abbott2008-02-021-4/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If the fakephp driver is used to emulate removal of a PCI device by writing text string "0" to the "power" sysfs attribute file, this causes its parent directory and its contents (including the "power" file) to be deleted before the write operation returns. Unfortunately, it ends up in a deadlock waiting for itself to complete. The deadlock is as follows: sysfs_write_file calls flush_write_buffer which calls sysfs_get_active_two before calling power_write_file in pci_hotplug_core.c via the sysfs store operation. The power_write_file function calls disable_slot in fakephp.c via the slot operation. The disable_slot function calls remove_slot which calls pci_hp_deregister (back in pci_hotplug_core.c) which calls fs_remove_slot which calls sysfs_remove_file to remove the "power" file. The sysfs_remove_file function calls sysfs_hash_and_remove which calls sysfs_addrm_finish which calls sysfs_deactivate. The sysfs_deactivate function sees that something has an active reference on the sysfs_dirent (from the previous call to sysfs_get_active_two back up the call stack somewhere) so waits for the active reference to go away, which is of course impossible. The problem has been present since 2.6.21. This patch breaks the deadlock by queuing work queue items on a single- threaded work queue to remove a slot from sysfs, and to rescan the PCI buses. There is also some protection against disabling a slot that is already being removed. Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Cc: Kristen Accardi <kristen.c.accardi@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* pciehp: block new requests from the device before power offKenji Kaneshige2008-02-021-12/+21
| | | | | | | | | | | Disable Bus Master, SERR# and INTx to ensure that no new Requests will be generated from the device before turning power off, in accordance with the specification. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* pciehp: workaround against Bad DLLP during power offKenji Kaneshige2008-02-021-0/+45
| | | | | | | | | | | | | | | | | | | | | | Set Bad DLLP Mask bit in Correctable Error Mask Register during turning power off the slot. This is the workaround against Bad DLLP error that sometimes happen during turning power off on the slot which conforms to PCI Express 1.0a spec. The cause of this error seems that PCI Express 1.0a spec doesn't have the following consideration that was added to PCI Express 1.1 spec. "If the port is associated with a hot-pluggable slot (Hot-Plug Capable bit in the Slot Capabilities register set to 1b), and Power Controller Control bit in Slot Control register is 1b(Off), then any transition to DL Inactive must not be considered an error." Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* pciehp: wait for 1000ms before LED operation after power offKenji Kaneshige2008-02-022-12/+7
| | | | | | | | | | After turning power off, we must wait for at least 1 second *before* LED operation. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PCI: Spelling fixesJoe Perches2008-02-021-1/+1
| | | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PCI Hotplug: PCIeHP: Fix some whitespace damageRolf Eike Beer2008-02-021-2/+1
| | | | | | | | | PCIeHP: Fix some whitespace damage Signed-off-by: Rolf Eike Beer <eike-hotplug@sf-tec.de> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PCI Hotplug: pciehp: use generic function to find ext capabilityKenji Kaneshige2008-02-021-6/+1
| | | | | | | | | Remove duplicated code to find an extend capability in PCIEHP driver. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PCI Hotplug: pciehp: remove needless hp_slot calculationKenji Kaneshige2008-02-021-11/+2
| | | | | | | | | Remove needless hp_slot calculation. This has no functional changes. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PCI Hotplug: pciehp: remove needless members from struct controllerKenji Kaneshige2008-02-022-13/+3
| | | | | | | | | | Remove needless members from struct controller. This has no functional changes. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PCI Hotplug: acpiphp: remove unneeded acpi_get_name function callMUNEDA Takahiro2008-02-021-1/+0
| | | | | | | | | acpi_get_name() is called before and after dbg(). The latter is useless and should be removed. Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PCI Hotplug: acpiphp: fix trivial typosMUNEDA Takahiro2008-02-021-2/+2
| | | | | | | | | fix trivial typos. Signed-off-by: MUNEDA Takahiro <muneda.takahiro@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PCIe: fix double initialization bugMark Lord2008-02-023-54/+69
| | | | | | | | | | | | | | | | Earlier patches to split out the hardware init for PCIe hotplug resulted in some one-time initializations being redone on every resume cycle. Eg. irq/polling initialization. This patch splits the hardware init into two parts, and separates the one-time initializations from those so that they only ever get done once, as intended. Signed-off-by: Mark Lord <mlord@pobox.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PCIE: Make use of the previously split out pcie_init_enable_events() functionMark Lord2008-02-023-1/+20
| | | | | | | | | | | | | Make use of the previously split out pcie_init_enable_events() function to reinitialize the hotplug hardware on resume from suspend, but only when pciehp_force==1. Otherwise behaviour is unmodified. Signed-off-by: Mark Lord <mlord@pobox.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PCI: more fixes for PCIe Hotplug so that it works with ExpressCard slots on ↵Mark Lord2008-02-021-81/+104
| | | | | | | | | | | | | | Dell notebooks (and others?) in conjunction with modparam of pciehp_force=1 Split out the hotplug hardware initialization code from pcie_init() into pcie_init_enable_events(), without changing any functionality. Signed-off-by: Mark Lord <mlord@pobox.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PCIE: fix PCIe Hotplug so that it works with ExpressCard slots on Dell ↵Mark Lord2008-02-023-1/+6
| | | | | | | | | | | | | | notebooks (and others?) in conjunction with modparam of pciehp_force=1. Fix pciehp_probe() to deal with ExpressCard cards that were inserted prior to the driver being loaded. Signed-off-by: Mark Lord <mlord@pobox.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PCI: Add missing "space" in printk messagesJoe Perches2008-02-021-1/+1
| | | | | | | Signed-off-by: Joe Perches <joe@perches.com> Cc: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* pci hotplug: fix rpaphp directory namingLinas Vepstas2008-02-023-38/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix presentation of the slot number in the /sys/bus/pci/slots directory to match that used in the majority of other drivers. > Greg said: > How is anyone supposed to write sane managability tools in the > presence > of such anarchy? > > > ~ # cat /sys/bus/pci/slots/0000:00:02.2/phy_location > > U787A.001.DNZ00Z5-P1-C2 > > Right. This should look like: > > # cat /sys/bus/pci/slots/U787A.001.DNZ00Z5-P1-C2/address > 0000:00:02 This patch implements exactly what you describe. Boot tested. I assume you really mean it -- if so, then please review and ack the patch !? I have absolutely no clue if this breaks any existing IBM tools. I'm pretty sure it doesn't ... but attention Mike Strosaker! does it? Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Cc: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Cc: <strosake@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PCI: hotplug: Link fakephp lastAlex Chiang2008-02-021-1/+3
| | | | | | | | | | | Currently, fakephp will claim all devices; we really only want it to claim those not in slots. Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Matthew Wilcox <matthew@wil.cx> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PCI: hotplug: pci_hotplug_core whitespace fixAlex Chiang2008-02-021-1/+1
| | | | | | | | | | Remove superfluous space. Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Matthew Wilcox <matthew@wil.cx> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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