diff options
author | Len Brown <len.brown@intel.com> | 2008-12-31 03:44:33 (GMT) |
---|---|---|
committer | Len Brown <len.brown@intel.com> | 2008-12-31 03:52:26 (GMT) |
commit | 087da3b4e2d7d3ef70a4fa649b9a286fdeb0e44e (patch) | |
tree | e078d81b7d34c4352fe50a26974e067328bf0141 /drivers | |
parent | 39488b041e2fdc206b3de4517b8f220ae07b2a20 (diff) | |
download | linux-fsl-qoriq-087da3b4e2d7d3ef70a4fa649b9a286fdeb0e44e.tar.xz |
ACPI: simplify buffer management for acpi_pci_bind() etc.
use ACPI_ALLOCATE_BUFFER to remove the allocations
within acpi_pci_bind(), acpi_pci_unbind() and acpi_pci_bind_root().
While there, delete some unnecessary param inits from those routines.
Delete concept of ACPI_PATHNAME_MAX, since this was the last use.
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/acpi/pci_bind.c | 80 |
1 files changed, 33 insertions, 47 deletions
diff --git a/drivers/acpi/pci_bind.c b/drivers/acpi/pci_bind.c index 53f502d..95650f8 100644 --- a/drivers/acpi/pci_bind.c +++ b/drivers/acpi/pci_bind.c @@ -111,12 +111,11 @@ EXPORT_SYMBOL(acpi_get_pci_id); int acpi_pci_bind(struct acpi_device *device) { int result = 0; - acpi_status status = AE_OK; - struct acpi_pci_data *data = NULL; - struct acpi_pci_data *pdata = NULL; - char *pathname = NULL; - struct acpi_buffer buffer = { 0, NULL }; - acpi_handle handle = NULL; + acpi_status status; + struct acpi_pci_data *data; + struct acpi_pci_data *pdata; + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; + acpi_handle handle; struct pci_dev *dev; struct pci_bus *bus; @@ -124,21 +123,18 @@ int acpi_pci_bind(struct acpi_device *device) if (!device || !device->parent) return -EINVAL; - pathname = kzalloc(ACPI_PATHNAME_MAX, GFP_KERNEL); - if (!pathname) - return -ENOMEM; - buffer.length = ACPI_PATHNAME_MAX; - buffer.pointer = pathname; - data = kzalloc(sizeof(struct acpi_pci_data), GFP_KERNEL); - if (!data) { - kfree(pathname); + if (!data) return -ENOMEM; + + status = acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer); + if (ACPI_FAILURE(status)) { + kfree(data); + return -ENODEV; } - acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer); ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI device [%s]...\n", - pathname)); + (char *)buffer.pointer)); /* * Segment & Bus @@ -262,7 +258,7 @@ int acpi_pci_bind(struct acpi_device *device) } end: - kfree(pathname); + kfree(buffer.pointer); if (result) kfree(data); @@ -272,25 +268,21 @@ int acpi_pci_bind(struct acpi_device *device) static int acpi_pci_unbind(struct acpi_device *device) { int result = 0; - acpi_status status = AE_OK; - struct acpi_pci_data *data = NULL; - char *pathname = NULL; - struct acpi_buffer buffer = { 0, NULL }; + acpi_status status; + struct acpi_pci_data *data; + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; if (!device || !device->parent) return -EINVAL; - pathname = kzalloc(ACPI_PATHNAME_MAX, GFP_KERNEL); - if (!pathname) - return -ENOMEM; + status = acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer); + if (ACPI_FAILURE(status)) + return -ENODEV; - buffer.length = ACPI_PATHNAME_MAX; - buffer.pointer = pathname; - acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer); ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Unbinding PCI device [%s]...\n", - pathname)); - kfree(pathname); + (char *) buffer.pointer)); + kfree(buffer.pointer); status = acpi_get_data(device->handle, acpi_pci_data_handler, @@ -322,50 +314,44 @@ acpi_pci_bind_root(struct acpi_device *device, struct acpi_pci_id *id, struct pci_bus *bus) { int result = 0; - acpi_status status = AE_OK; + acpi_status status; struct acpi_pci_data *data = NULL; - char *pathname = NULL; - struct acpi_buffer buffer = { 0, NULL }; - - pathname = kzalloc(ACPI_PATHNAME_MAX, GFP_KERNEL); - if (!pathname) - return -ENOMEM; - - buffer.length = ACPI_PATHNAME_MAX; - buffer.pointer = pathname; + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; if (!device || !id || !bus) { - kfree(pathname); return -EINVAL; } data = kzalloc(sizeof(struct acpi_pci_data), GFP_KERNEL); - if (!data) { - kfree(pathname); + if (!data) return -ENOMEM; - } data->id = *id; data->bus = bus; device->ops.bind = acpi_pci_bind; device->ops.unbind = acpi_pci_unbind; - acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer); + status = acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer); + if (ACPI_FAILURE(status)) { + kfree (data); + return -ENODEV; + } ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI root bridge [%s] to " - "%04x:%02x\n", pathname, id->segment, id->bus)); + "%04x:%02x\n", (char *)buffer.pointer, + id->segment, id->bus)); status = acpi_attach_data(device->handle, acpi_pci_data_handler, data); if (ACPI_FAILURE(status)) { ACPI_EXCEPTION((AE_INFO, status, "Unable to attach ACPI-PCI context to device %s", - pathname)); + (char *)buffer.pointer)); result = -ENODEV; goto end; } end: - kfree(pathname); + kfree(buffer.pointer); if (result != 0) kfree(data); |