diff --git a/drivers/platform/x86/intel/speed_select_if/isst_if_common.c b/drivers/platform/x86/intel/speed_select_if/isst_if_common.c index cdf0501f4e4f..19e671500f00 100644 --- a/drivers/platform/x86/intel/speed_select_if/isst_if_common.c +++ b/drivers/platform/x86/intel/speed_select_if/isst_if_common.c @@ -262,11 +262,13 @@ bool isst_if_mbox_cmd_set_req(struct isst_if_mbox_cmd *cmd) } EXPORT_SYMBOL_GPL(isst_if_mbox_cmd_set_req); +static int isst_if_api_version; + static int isst_if_get_platform_info(void __user *argp) { struct isst_if_platform_info info; - info.api_version = ISST_IF_API_VERSION; + info.api_version = isst_if_api_version; info.driver_version = ISST_IF_DRIVER_VERSION; info.max_cmds_per_ioctl = ISST_IF_CMD_LIMIT; info.mbox_supported = punit_callbacks[ISST_IF_DEV_MBOX].registered; @@ -767,6 +769,10 @@ int isst_if_cdev_register(int device_type, struct isst_if_cmd_cb *cb) mutex_unlock(&punit_misc_dev_open_lock); return -EAGAIN; } + if (!cb->api_version) + cb->api_version = ISST_IF_API_VERSION; + if (cb->api_version > isst_if_api_version) + isst_if_api_version = cb->api_version; memcpy(&punit_callbacks[device_type], cb, sizeof(*cb)); punit_callbacks[device_type].registered = 1; mutex_unlock(&punit_misc_dev_open_lock); diff --git a/drivers/platform/x86/intel/speed_select_if/isst_if_common.h b/drivers/platform/x86/intel/speed_select_if/isst_if_common.h index 34a172e5c82c..1004f2c9cca8 100644 --- a/drivers/platform/x86/intel/speed_select_if/isst_if_common.h +++ b/drivers/platform/x86/intel/speed_select_if/isst_if_common.h @@ -41,6 +41,7 @@ * @offset: Offset to the first valid member in command structure. * This will be the offset of the start of the command * after command count field + * @api_version: API version supported for this target. 0, if none. * @owner: Registered module owner * @cmd_callback: Callback function to handle IOCTL. The callback has the * command pointer with data for command. There is a pointer @@ -60,7 +61,7 @@ struct isst_if_cmd_cb { int registered; int cmd_size; int offset; - + int api_version; struct module *owner; long (*cmd_callback)(u8 *ptr, int *write_only, int resume); long (*def_ioctl)(struct file *file, unsigned int cmd, unsigned long arg);