diff options
| -rw-r--r-- | drivers/staging/unisys/visorbus/visorbus_main.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/staging/unisys/visorbus/visorbus_main.c b/drivers/staging/unisys/visorbus/visorbus_main.c index 4348072211a7..08acfe82c8ef 100644 --- a/drivers/staging/unisys/visorbus/visorbus_main.c +++ b/drivers/staging/unisys/visorbus/visorbus_main.c @@ -29,6 +29,7 @@ #define CURRENT_FILE_PC VISOR_BUS_PC_visorbus_main_c #define POLLJIFFIES_NORMALCHANNEL 10 +static bool initialized; /* stores whether bus_registration was successful */ static struct dentry *visorbus_debugfs_dir; /* @@ -959,6 +960,9 @@ visordriver_probe_device(struct device *xdev) */ int visorbus_register_visor_driver(struct visor_driver *drv) { + if (!initialized) + return -ENODEV; /* can't register on a nonexistent bus */ + drv->driver.name = drv->name; drv->driver.bus = &visorbus_type; drv->driver.probe = visordriver_probe_device; @@ -1297,6 +1301,7 @@ visorbus_init(void) POSTCODE_LINUX(BUS_CREATE_ENTRY_PC, 0, 0, DIAG_SEVERITY_ERR); goto error; } + initialized = true; bus_device_info_init(&chipset_driverinfo, "chipset", "visorchipset"); @@ -1322,5 +1327,6 @@ visorbus_exit(void) } bus_unregister(&visorbus_type); + initialized = false; debugfs_remove_recursive(visorbus_debugfs_dir); } |