Messages in this thread Patch in this message | | | From | Wei Yang <> | Subject | [Patch V3 4/4] iommu/vt-d: refine dmar_acpi_dev_scope_init() with dmar_walk_dmar_table() | Date | Wed, 23 Mar 2016 14:15:49 +0000 |
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dmar_acpi_dev_scope_init() iterates on the remapping structure and just do proper job for ANDD structure. This is the what dmar_walk_dmar_table() does.
This patch improves the code with dmar_walk_dmar_table().
Signed-off-by: Wei Yang <richard.weiyang@gmail.com> --- drivers/iommu/dmar.c | 56 ++++++++++++++++++++++++++++---------------------- 1 file changed, 32 insertions(+), 24 deletions(-)
diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c index 35fc8fb..6281b45 100644 --- a/drivers/iommu/dmar.c +++ b/drivers/iommu/dmar.c @@ -733,36 +733,44 @@ static void __init dmar_acpi_insert_dev_scope(u8 device_number, device_number, dev_name(&adev->dev)); } -static int __init dmar_acpi_dev_scope_init(void) +static int __dmar_acpi_dev_scope_init(struct acpi_dmar_header *header, + void *arg) { struct acpi_dmar_andd *andd; + acpi_handle h; + struct acpi_device *adev; + + andd = (struct acpi_dmar_andd *)header; + if (!ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, + andd->device_name, + &h))) { + pr_err("Failed to find handle for ACPI object %s\n", + andd->device_name); + return 0; + } + if (acpi_bus_get_device(h, &adev)) { + pr_err("Failed to get device for ACPI object %s\n", + andd->device_name); + return 0; + } + dmar_acpi_insert_dev_scope(andd->device_number, adev); + return 0; +} + +static int __init dmar_acpi_dev_scope_init(void) +{ + struct acpi_table_dmar *dmar; + struct dmar_res_callback cb = { + .print_entry = false, + .ignore_unhandled = true, + .cb[ACPI_DMAR_TYPE_NAMESPACE] = &__dmar_acpi_dev_scope_init, + }; if (dmar_tbl == NULL) return -ENODEV; - for (andd = (void *)dmar_tbl + sizeof(struct acpi_table_dmar); - ((unsigned long)andd) < ((unsigned long)dmar_tbl) + dmar_tbl->length; - andd = ((void *)andd) + andd->header.length) { - if (andd->header.type == ACPI_DMAR_TYPE_NAMESPACE) { - acpi_handle h; - struct acpi_device *adev; - - if (!ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, - andd->device_name, - &h))) { - pr_err("Failed to find handle for ACPI object %s\n", - andd->device_name); - continue; - } - if (acpi_bus_get_device(h, &adev)) { - pr_err("Failed to get device for ACPI object %s\n", - andd->device_name); - continue; - } - dmar_acpi_insert_dev_scope(andd->device_number, adev); - } - } - return 0; + dmar = (struct acpi_table_dmar *)dmar_tbl; + return dmar_walk_dmar_table(dmar, &cb); } int __init dmar_dev_scope_init(void) -- 1.7.9.5
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