- 20 Mar, 2009 40 commits
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Alex Chiang authored
The PCIe port driver calls pci_enable_device when registering ports, but never calls pci_disable_device during removal. Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Alex Chiang authored
Commit 55633af3 (PCIe portdrv: Use driver data to simplify code) added a kfree of the driver private data in pcie_port_device_remove but forgot to remove the old kfree from pcie_portdrv_remove. Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Geert Uytterhoeven authored
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Yuji Shimada authored
This patch allows memory resources to be assigned with a specified alignment at boot-time or run-time. The patch is useful when we use PCI pass-through, because page-aligned memory resources are required to securely share PCI resources with guest drivers. If you want to assign the resource at boot time, please set "pci=resource_alignment=" boot parameter. This is format of "pci=resource_alignment=" boot parameter: [<order of align>@][<domain>:]<bus>:<slot>.<func>[; ...] Specifies alignment and device to reassign aligned memory resources. If <order of align> is not specified, PAGE_SIZE is used as alignment. PCI-PCI bridge can be specified, if resource windows need to be expanded. This is example: pci=resource_alignment=20@07:00.0;18@0f:00.0;00:1d.7 If you want to assign the resource at run-time, please set "/sys/bus/pci/resource_alignment" file, and hot-remove the device and hot-add the device. For this purpose, fakephp or PCI hotplug interfaces can be used. The format of "/sys/bus/pci/resource_alignment" file is the same with boot parameter. You can use "," instead of ";". For example: # cd /sys/bus/pci # echo -n 20@12:00.0 > resource_alignment # echo 1 > devices/0000:12:00.0/remove # echo 1 > rescan Reviewed-by: Alex Chiang <achiang@hp.com> Reviewed-by: Yu Zhao <yu.zhao@intel.com> Signed-off-by: Yuji Shimada <shimada-yxb@necst.nec.co.jp> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Matthew Wilcox authored
Add the new API pci_enable_msi_block() to allow drivers to request multiple MSI and reimplement pci_enable_msi in terms of pci_enable_msi_block. Ensure that the architecture back ends don't have to know about multiple MSI. Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Matthew Wilcox authored
Since most of the callers already know whether they have an MSI or an MSI-X capability, split msi_set_mask_bits() into msi_mask_irq() and msix_mask_irq(). The only callers which don't (mask_msi_irq() and unmask_msi_irq()) can share code in msi_set_mask_bit(). This then becomes the only caller of msix_flush_writes(), so we can inline it. The flushing read can be to any address that belongs to the device, so we can eliminate the calculation too. We can also get rid of maskbits_mask from struct msi_desc and simply recalculate it on the rare occasion that we need it. The single-bit 'masked' element is replaced by a copy of the 32-bit 'masked' register, so this patch does not affect the size of msi_desc. Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Matthew Wilcox authored
MSI interrupts have a mask_pos where MSI-X have a mask_base. Use a transparent union to get rid of some ugly casts. Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Matthew Wilcox authored
By passing the pci_dev into alloc_msi_entry() we can be sure that the ->dev entry is always assigned and so we don't need to check it. Also, we used kzalloc() so we don't need to initialise ->irq to 0. Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Matthew Wilcox authored
By changing from a 5-bit field to a 1-bit field, we free up some bits that can be used by a later patch. Also rearrange the fields for better packing on 64-bit platforms (reducing the size of msi_desc from 72 bytes to 64 bytes). Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Matthew Wilcox authored
I didn't find the previous version very useful, so I rewrote it. Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Reviewed-by: Randy Dunlap <randy.dunlap@oracle.com> Reviewed-by: Grant Grundler <grundler@parisc-linunx.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Chris Wright authored
This adds a remove_id sysfs entry to allow users of new_id to later remove the added dynid. One use case is management tools that want to dynamically bind/unbind devices to pci-stub driver while devices are assigned to KVM guests. Rather than having to track which driver was originally bound to the driver, a mangement tool can simply: Guest uses device Signed-off-by: Chris Wright <chrisw@sous-sol.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Bjorn Helgaas authored
This patch changes a VIA PCI quirk to use dev_info() rather than printk(). Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgek.org>
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Yu Zhao authored
Reviewed-by: Matthew Wilcox <matthew@wil.cx> Signed-off-by: Yu Zhao <yu.zhao@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Kenji Kaneshige authored
Current pci_common_swizzle() seems to have a assumption that pci_bus->self is NULL on the pci root bus. But it might not be true on some platforms. Because of this wrong assumption, pci_common_swizzle() might cause endless loop. We must check pci_bus->parent instead. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Kenji Kaneshige authored
Current pci_get_interrupt_pin() seems to have an assumption that pci_bus->self is NULL on the root pci bus. But it might not be true on some platforms. Because of this wrong assumption, current pci_get_interrupt_pin() might cause endless loop. We must check pci_bus->parent instead. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Kenji Kaneshige authored
Current pci_read_bridge_bases() has an assumption that pci_bus->self is NULL on the pci root bus (It checks pci_bus->self to see if the pci bus is root bus). But is might not true on some platforms. We must check pci_bus->parent instead. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Kenji Kaneshige authored
Current pci_find_upstream_pcie_bridge() has a wrong assumption that pci_bus->self is NULL on the root pci bus. But it might not true on some platforms. Because of this wrong assumption, current pci_find_upstream_pcie_bridge() might cause endless loop. We must check pci_bus->parent instead. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Kenji Kaneshige authored
Current acpi_get_hp_hw_control_from_firmware() has a assumption that pci_bus->self is NULL on a PCI root bus. But it might not be true on some platforms. Because of this wrong assumption, current acpi_get_hp_hw_control_from_firmware() might cause endless loop. We must check pci_bus->parent instead. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Kenji Kaneshige authored
Current acpi_get_hp_params_from_firmware() has a assumption that pci_bus->self is NULL on the root pci bus. But it might not true on some platforms. Because of this wrong assumption, current acpi_get_hp_params_from_firmware() might cause endless loop. We must check pci_bus->parent instead. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Kenji Kaneshige authored
Current acpi_find_root_bridge_handle() has a assumption that pci_bus->self is NULL on the root pci bus. But it might not be true on some platforms. Because of this wrong assumption, current acpi_find_root_bridge_handle() might cause endless loop. We must check pci_bus->parent instead. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Kenji Kaneshige authored
Current acpi_pci_get_bridge_handle() has an assumption that pci_bus->self is NULL on the root pci bus. But it might not true on some platforms. Because of this wrong assumption, current acpi_pci_get_bridge_handle() might return improper ACPI handle. We must check pci_bus->parent instead. This bug is the root cause of the following kernel panic reported by James Bottomley. This problem was introduced by the commit e8c331e9. The immediate cause was acpi_pci_get_bridge_handle() returned NULL unexpectedly and it was passed as the second argument of acpi_walk_namespace(). pci_hotplug: PCI Hot Plug PCI Core version: 0.5 acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5 BUG: unable to handle kernel NULL pointer dereference at 0000000000000010 IP: [<ffffffff8039646f>] acpi_ns_get_next_node+0xb/0x3c PGD 0 Oops: 0000 [#1] SMP last sysfs file: CPU 0 Modules linked in: Pid: 1, comm: swapper Not tainted 2.6.28 #1 RIP: 0010:[<ffffffff8039646f>] [<ffffffff8039646f>] acpi_ns_get_next_node+0xb/0x3c RSP: 0018:ffff88007f87fd30 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff8037d260 R09: ffff88007f87fdfc R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffffffff80742040(0000) knlGS:0000000000000000 CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b CR2: 0000000000000010 CR3: 0000000000201000 CR4: 00000000000006a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process swapper (pid: 1, threadinfo ffff88007f87e000, task ffff88007f875040) Stack: 0000000000000000 ffffffff803964f5 ffff88007f81b728 0000000000001001 ffff88007f87fdfc ffffffff8037d260 0000000600000001 0000000000000000 ffffffff8037d260 0000000000000000 0000000000000001 ffff88007f87fdfc Call Trace: [<ffffffff803964f5>] acpi_ns_walk_namespace+0x55/0x138 [<ffffffff8037d260>] is_pci_dock_device+0x0/0x20 [<ffffffff8037d260>] is_pci_dock_device+0x0/0x20 [<ffffffff80394a9e>] acpi_walk_namespace+0x5f/0x83 [<ffffffff8037dd33>] detect_ejectable_slots+0x53/0x70 [<ffffffff8037de38>] add_bridge+0xe8/0x200 [<ffffffff80394aaa>] acpi_walk_namespace+0x6b/0x83 [<ffffffff803a4ad1>] acpi_pci_register_driver+0x48/0x61 [<ffffffff806fc5df>] acpiphp_init+0x0/0x58 [<ffffffff806fc732>] acpiphp_glue_init+0x4c/0x5a [<ffffffff806fc616>] acpiphp_init+0x37/0x58 [<ffffffff8020903b>] _stext+0x3b/0x180 [<ffffffff80312598>] create_proc_entry+0x58/0xa0 [<ffffffff802815d1>] register_irq_proc+0xc1/0xe0 [<ffffffff806db64b>] kernel_init+0x152/0x1ac [<ffffffff8023d970>] finish_task_switch+0x0/0x110 [<ffffffff8020ca7a>] child_rip+0xa/0x20 [<ffffffff8020c47c>] restore_args+0x0/0x30 [<ffffffff806db4f9>] kernel_init+0x0/0x1ac [<ffffffff8020ca70>] child_rip+0x0/0x20 Code: 89 c2 48 8b 00 48 85 c0 75 f5 48 8b 45 00 48 89 02 44 88 65 09 48 89 5d 00 31 c0 5b 5d 41 5c c3 53 48 85 d2 89 fb 48 89 d7 75 06 <48> 8b 56 10 eb 08 e8 73 f1 ff ff 48 89 c2 85 db 74 1a eb 13 0f RIP [<ffffffff8039646f>] acpi_ns_get_next_node+0xb/0x3c RSP <ffff88007f87fd30> CR2: 0000000000000010 ---[ end trace a7919e7f17c0a725 ]--- Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Rafael J. Wysocki authored
Implement pm object for the PCI Express port driver in order to use the new power management framework and reduce the code size. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Eric W. Biederman authored
pcie_port_device_remove currently calls the remove method of port drivers twice. Ouch! We are calling device_for_each_child multiple times for no apparent reason. So make it simple. Place put_device and device_unregister into remove_iter, and throw out the rest. Only call device_for_each_child once. The code is simpler and actually works! Signed-off-by: Eric W. Biederman <ebiederm@aristanetworks.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Ivan Kokshaysky authored
This closes http://bugzilla.kernel.org/show_bug.cgi?id=10893 which is a showstopper for X development on alpha. The generic HAVE_PCI_MMAP code (drivers/pci-sysfs.c) is not very useful since we have to deal with three different types of MMIO address spaces: sparse and dense mappings for old ev4/ev5 machines and "normal" 1:1 MMIO space (bwx) for ev56 and later. Also "write combine" mappings are meaningless on alpha - roughly speaking, alpha does write combining, IO reordering and other optimizations by default, unless user splits IO accesses with memory barriers. I think the cleanest way to deal with resource files on alpha is to convert the default no-op pci_create_resource_files() and pci_remove_resource_files() for !HAVE_PCI_MMAP case into __weak functions and override them with alpha specific ones. Another alpha hook is needed for "legacy_" resource files to handle sparse addressing (pci_adjust_legacy_attr). With the "standard" resourceN files on ev56/ev6 libpciaccess works "out of the box". Handling of resourceN_sparse/resourceN_dense files on older machines obviously requires some userland work. Sparse/dense stuff has been tested on sx164 (pca56/pyxis, normally uses bwx IO) with the kernel hacked into "cia compatible" mode. Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Andrew Morton authored
drivers/pci/hotplug/fakephp.c: In function 'pci_rescan_bus': drivers/pci/hotplug/fakephp.c:271: warning: passing argument 1 of 'pci_bus_assign_resources' discards qualifiers from pointer target type Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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akpm@linux-foundation.org authored
drivers/pci/hotplug/fakephp.c:283: warning: passing argument 1 of 'pci_bus_add_devices' discards qualifiers from pointer target type Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Michael Ellerman authored
There is code in msix_capability_init() which, when the requested number of MSI-X couldn't be allocated, calculates how many MSI-X /could/ be allocated and returns that to the driver. That allows the driver to then make a second request, with a number of MSIs that should succeed. The current code requires the arch code to setup as many msi_descs as it can, and then return to the generic code. On some platforms the arch code may already know how many MSI-X it can allocate, before it sets up any of the msi_descs. So change the logic such that if the arch code returns a positive error code, that is taken to be the number of MSI-X that could be allocated. If the error code is negative we still calculate the number available using the old method. Because it's a little subtle, make sure the error return code from arch_setup_msi_irq() is always negative. That way only implementations of arch_setup_msi_irqs() need to be careful about returning a positive error code. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Roel Kluin authored
With for (busnr = 0; busnr <= end; busnr++) { ... } busnr reaches end + 1 after the loop. So fix the "no busses available" check to look for just busnr > end rather than >=. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Kenji Kaneshige authored
- Rename pci_osc_control_set() to acpi_pci_osc_control_set() according to the other API names in drivers/acpi/pci_root.c. - Move _OSC related definitions to include/linux/acpi.h because _OSC related API is implemented in drivers/acpi/pci_root.c now. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Reviewed-by: Andrew Patterson <andrew.patterson@hp.com> Tested-by: Andrew Patterson <andrew.patterson@hp.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Kenji Kaneshige authored
Move PCI _OSC management code from drivers/pci/pci-acpi.c to drivers/acpi/pci_root.c. The benefits are - We no longer need struct osc_data and its management code (contents are moved to struct acpi_pci_root). This simplify the code, and we no longer care about kmalloc() failure. - We can make pci_acpi_osc_support() be a static function, which is called only from drivers/acpi/pci_root.c. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Reviewed-by: Andrew Patterson <andrew.patterson@hp.com> Tested-by: Andrew Patterson <andrew.patterson@hp.com> Acked-by: Alex Chiang <achiang@hp.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Sheng Yang authored
For all devices need to do function level reset, currently we need wait for at least 200ms, which can be too long if we have lots of devices... The patch checked pending bit before msleep() to skip some unnecessary sleeping interval. Signed-off-by: Sheng Yang <sheng@linux.intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Jiri Slaby authored
Let it stay as serial, since it doesn't have subdevice in the form of 0x00PS. Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Alex Chiang authored
Convert usages of pr_debug to dev_dbg and add physical slot name. Note that we use dev_dbg on the struct pci_bus and still manually print out the PCI slot number (instead of calling dev_dbg on a pci_dev) because a struct pci_bus with empty physical slots will not have any pci_devs. Reviewed-by: Andrew Patterson <andrew.patterson@hp.com> Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Kenji Kaneshige authored
The cmd_busy field in struct controller takes only two values 0 or 1. So it should be one bit. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Kenji Kaneshige authored
Current pciehp disables software notification of adapter presence changed event and MRL changed event when slot is turned off. Because of this, there is no way to detect those events on empty slots in the current pciehp implementation. According to the past discussion(*), this behavior was introduced to prevent endless loop that could happen if pcie_isr() runs after power fault is detected on a certain platform whose stickey power-fault bit remains on till the slot is powered on again. (*) http://sourceforge.net/mailarchive/message.php?msg_id=20051130135409.A14918%40unix-os.sc.intel.com I think this endless loop can be avoided using one bit flag that indicates power fault had been detected, instead of disabling software notification of adapter present changed event and MRL changed event. With this patch, we can enable software notification mechanism of presence changed and MRL changed event on the empty slots again. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Kenji Kaneshige authored
Fix possible endless loop in pcie_isr. Currently, pcie_isr() (interrupt service routine of pciehp) can end up in an endless loop if the Slot Status register is set again immediately after being cleared. According to the past discussion (see below URL) this case can happen if the power fault detected bit is set during handling. http://sourceforge.net/mailarchive/message.php?msg_id=20051130135409.A14918%40unix-os.sc.intel.comSigned-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Julia Lawall authored
Error handling code following a kmalloc should free the allocated data. Since the subsequent code that could provoke an error does not use the allocated data, the allocation is just moved below it. The semantic match that finds the problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @r exists@ local idexpression x; statement S; expression E; identifier f,l; position p1,p2; expression *ptr != NULL; @@ ( if ((x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...)) == NULL) S | x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...); ... if (x == NULL) S ) <... when != x when != if (...) { <+...x...+> } x->f = E ...> ( return \(0\|<+...x...+>\|ptr\); | return@p2 ...; ) @script:python@ p1 << r.p1; p2 << r.p2; @@ print "* file: %s kmalloc %s return %s" % (p1[0].file,p1[0].line,p2[0].line) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Reviewed-by: Matthew Wilcox <willy@linux.intel.com> Reviewed-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Frank Seidel authored
According to kerneljanitors todo list all printk calls (beginning a new line) should have an according KERN_* constant. Those are the missing pieces here for the pci subsystem. Signed-off-by: Frank Seidel <frank@f-seidel.de> Reviewed-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Tested-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Yu Zhao authored
When removing a bus, 'is_added' should be checked to make sure the bus has been successfully added by pci_bus_add_child() who will sets 'is_added'. Signed-off-by: Yu Zhao <yu.zhao@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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Michael Ellerman authored
Weak functions aren't all they're cracked up to be. They lead to incorrect binaries with some toolchains, they require us to have empty functions we otherwise wouldn't, and the unused code is not elided (as of gcc 4.3.2 anyway). So replace the weak MSI arch hooks with the #define foo foo idiom. We no longer need empty versions of arch_setup/teardown_msi_irq(). This is less source (by 1 line!), and results in smaller binaries too: text data bss dec hex filename 9354300 1693916 678424 11726640 b2ef30 build/powerpc/vmlinux-before 9354052 1693852 678424 11726328 b2edf8 build/powerpc/vmlinux-after Also smaller on x86_64 and arm (iop13xx). Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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