diff options
| -rw-r--r-- | drivers/acpi/scan.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 57570ac47803..e6ce262b5d44 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -39,20 +39,26 @@ static int create_modalias(struct acpi_device *acpi_dev, char *modalias, int size) { int len; + int count; - if (!acpi_dev->flags.hardware_id) + if (!acpi_dev->flags.hardware_id && !acpi_dev->flags.compatible_ids) return -ENODEV; - len = snprintf(modalias, size, "acpi:%s:", - acpi_dev->pnp.hardware_id); - if (len < 0 || len >= size) - return -EINVAL; + len = snprintf(modalias, size, "acpi:"); size -= len; + if (acpi_dev->flags.hardware_id) { + count = snprintf(&modalias[len], size, "%s:", + acpi_dev->pnp.hardware_id); + if (count < 0 || count >= size) + return -EINVAL; + len += count; + size -= count; + } + if (acpi_dev->flags.compatible_ids) { struct acpi_compatible_id_list *cid_list; int i; - int count; cid_list = acpi_dev->pnp.cid_list; for (i = 0; i < cid_list->count; i++) { |