diff options
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/dmar.c | 28 |
1 files changed, 16 insertions, 12 deletions
diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c index 158156543410..58dde75c5229 100644 --- a/drivers/iommu/dmar.c +++ b/drivers/iommu/dmar.c @@ -117,13 +117,9 @@ static int __init dmar_parse_one_dev_scope(struct acpi_dmar_device_scope *scope, return 0; } -int __init dmar_parse_dev_scope(void *start, void *end, int *cnt, - struct pci_dev ***devices, u16 segment) +void *dmar_alloc_dev_scope(void *start, void *end, int *cnt) { struct acpi_dmar_device_scope *scope; - void * tmp = start; - int index; - int ret; *cnt = 0; while (start < end) { @@ -138,15 +134,24 @@ int __init dmar_parse_dev_scope(void *start, void *end, int *cnt, start += scope->length; } if (*cnt == 0) - return 0; + return NULL; + + return kcalloc(*cnt, sizeof(struct pci_dev *), GFP_KERNEL); +} + +int __init dmar_parse_dev_scope(void *start, void *end, int *cnt, + struct pci_dev ***devices, u16 segment) +{ + struct acpi_dmar_device_scope *scope; + int index, ret; - *devices = kcalloc(*cnt, sizeof(struct pci_dev *), GFP_KERNEL); - if (!*devices) + *devices = dmar_alloc_dev_scope(start, end, cnt); + if (*cnt == 0) + return 0; + else if (!*devices) return -ENOMEM; - start = tmp; - index = 0; - while (start < end) { + for (index = 0; start < end; start += scope->length) { scope = start; if (scope->entry_type == ACPI_DMAR_SCOPE_TYPE_ENDPOINT || scope->entry_type == ACPI_DMAR_SCOPE_TYPE_BRIDGE) { @@ -158,7 +163,6 @@ int __init dmar_parse_dev_scope(void *start, void *end, int *cnt, } index ++; } - start += scope->length; } return 0; |