diff options
| author | Jiang Liu <jiang.liu@linux.intel.com> | 2014-11-09 22:48:03 +0800 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2014-11-18 15:22:35 +0100 |
| commit | 864b94adfcba752aa902ee34497bbe58b97aa8d3 (patch) | |
| tree | 572a8b8cfbaf62d2b94c2a36ec0dbee970dc5f8b /drivers/acpi | |
| parent | ffebeb46dd34736c90ffbca1ccb0bef8f4827c44 (diff) | |
| download | talos-op-linux-864b94adfcba752aa902ee34497bbe58b97aa8d3.tar.gz talos-op-linux-864b94adfcba752aa902ee34497bbe58b97aa8d3.zip | |
pci, ACPI, iommu: Enhance pci_root to support DMAR device hotplug
Finally enhance pci_root driver to support DMAR device hotplug when
hot-plugging PCI host bridges.
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Reviewed-by: Yijing Wang <wangyijing@huawei.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/pci_root.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index cd4de7e038ea..c6bcb8c719d8 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -33,6 +33,7 @@ #include <linux/pci.h> #include <linux/pci-acpi.h> #include <linux/pci-aspm.h> +#include <linux/dmar.h> #include <linux/acpi.h> #include <linux/slab.h> #include <linux/dmi.h> @@ -525,6 +526,7 @@ static int acpi_pci_root_add(struct acpi_device *device, struct acpi_pci_root *root; acpi_handle handle = device->handle; int no_aspm = 0, clear_aspm = 0; + bool hotadd = system_state != SYSTEM_BOOTING; root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL); if (!root) @@ -571,6 +573,11 @@ static int acpi_pci_root_add(struct acpi_device *device, strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS); device->driver_data = root; + if (hotadd && dmar_device_add(handle)) { + result = -ENXIO; + goto end; + } + pr_info(PREFIX "%s [%s] (domain %04x %pR)\n", acpi_device_name(device), acpi_device_bid(device), root->segment, &root->secondary); @@ -597,7 +604,7 @@ static int acpi_pci_root_add(struct acpi_device *device, root->segment, (unsigned int)root->secondary.start); device->driver_data = NULL; result = -ENODEV; - goto end; + goto remove_dmar; } if (clear_aspm) { @@ -611,7 +618,7 @@ static int acpi_pci_root_add(struct acpi_device *device, if (device->wakeup.flags.run_wake) device_set_run_wake(root->bus->bridge, true); - if (system_state != SYSTEM_BOOTING) { + if (hotadd) { pcibios_resource_survey_bus(root->bus); pci_assign_unassigned_root_bus_resources(root->bus); } @@ -621,6 +628,9 @@ static int acpi_pci_root_add(struct acpi_device *device, pci_unlock_rescan_remove(); return 1; +remove_dmar: + if (hotadd) + dmar_device_remove(handle); end: kfree(root); return result; @@ -639,6 +649,8 @@ static void acpi_pci_root_remove(struct acpi_device *device) pci_remove_root_bus(root->bus); + dmar_device_remove(device->handle); + pci_unlock_rescan_remove(); kfree(root); |
