From 2d0d0011ff48f000ec789f9b7e3378886225ec68 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Wed, 17 Feb 2016 12:26:38 -0600 Subject: Revert "PCI: Add helpers to manage pci_dev->irq and pci_dev->irq_managed" commit 67b4eab91caf2ad574cab1b17ae09180ea2e116e upstream. Revert 811a4e6fce09 ("PCI: Add helpers to manage pci_dev->irq and pci_dev->irq_managed"). This is part of reverting 991de2e59090 ("PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()") to fix regressions it introduced. Link: https://bugzilla.kernel.org/show_bug.cgi?id=111211 Fixes: 991de2e59090 ("PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()") Signed-off-by: Bjorn Helgaas Acked-by: Rafael J. Wysocki CC: Jiang Liu Signed-off-by: Greg Kroah-Hartman --- drivers/acpi/pci_irq.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) (limited to 'drivers/acpi/pci_irq.c') diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c index c9336751e5e3..172b74df0fa7 100644 --- a/drivers/acpi/pci_irq.c +++ b/drivers/acpi/pci_irq.c @@ -409,7 +409,7 @@ int acpi_pci_irq_enable(struct pci_dev *dev) return 0; } - if (pci_has_managed_irq(dev)) + if (dev->irq_managed && dev->irq > 0) return 0; entry = acpi_pci_irq_lookup(dev, pin); @@ -454,7 +454,8 @@ int acpi_pci_irq_enable(struct pci_dev *dev) kfree(entry); return rc; } - pci_set_managed_irq(dev, rc); + dev->irq = rc; + dev->irq_managed = 1; if (link) snprintf(link_desc, sizeof(link_desc), " -> Link[%s]", link); @@ -477,7 +478,7 @@ void acpi_pci_irq_disable(struct pci_dev *dev) u8 pin; pin = dev->pin; - if (!pin || !pci_has_managed_irq(dev)) + if (!pin || !dev->irq_managed || dev->irq <= 0) return; entry = acpi_pci_irq_lookup(dev, pin); @@ -499,6 +500,7 @@ void acpi_pci_irq_disable(struct pci_dev *dev) dev_dbg(&dev->dev, "PCI INT %c disabled\n", pin_name(pin)); if (gsi >= 0) { acpi_unregister_gsi(gsi); - pci_reset_managed_irq(dev); + dev->irq_managed = 0; + dev->irq = 0; } } -- cgit v1.2.3 From c1491657c533307ac2f341e1b7ecdf156de3f647 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Wed, 17 Feb 2016 12:26:42 -0600 Subject: Revert "PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()" MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit commit 6c777e8799a93e3bdb67bec622429e1b48dc90fb upstream. 991de2e59090 ("PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()") appeared in v4.3 and helps support IOAPIC hotplug. Олег reported that the Elcus-1553 TA1-PCI driver worked in v4.2 but not v4.3 and bisected it to 991de2e59090. Sunjin reported that the RocketRAID 272x driver worked in v4.2 but not v4.3. In both cases booting with "pci=routirq" is a workaround. I think the problem is that after 991de2e59090, we no longer call pcibios_enable_irq() for upstream bridges. Prior to 991de2e59090, when a driver called pci_enable_device(), we recursively called pcibios_enable_irq() for upstream bridges via pci_enable_bridge(). After 991de2e59090, we call pcibios_enable_irq() from pci_device_probe() instead of the pci_enable_device() path, which does *not* call pcibios_enable_irq() for upstream bridges. Revert 991de2e59090 to fix these driver regressions. Link: https://bugzilla.kernel.org/show_bug.cgi?id=111211 Fixes: 991de2e59090 ("PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()") Reported-and-tested-by: Олег Мороз Reported-by: Sunjin Yang Signed-off-by: Bjorn Helgaas Acked-by: Rafael J. Wysocki CC: Jiang Liu Signed-off-by: Greg Kroah-Hartman --- drivers/acpi/pci_irq.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'drivers/acpi/pci_irq.c') diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c index 172b74df0fa7..8a10a7ae6a8a 100644 --- a/drivers/acpi/pci_irq.c +++ b/drivers/acpi/pci_irq.c @@ -481,6 +481,14 @@ void acpi_pci_irq_disable(struct pci_dev *dev) if (!pin || !dev->irq_managed || dev->irq <= 0) return; + /* Keep IOAPIC pin configuration when suspending */ + if (dev->dev.power.is_prepared) + return; +#ifdef CONFIG_PM + if (dev->dev.power.runtime_status == RPM_SUSPENDING) + return; +#endif + entry = acpi_pci_irq_lookup(dev, pin); if (!entry) return; @@ -501,6 +509,5 @@ void acpi_pci_irq_disable(struct pci_dev *dev) if (gsi >= 0) { acpi_unregister_gsi(gsi); dev->irq_managed = 0; - dev->irq = 0; } } -- cgit v1.2.3