From 874c6241b2e49e52680d32a50d4909c7768d5cb9 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 13 Dec 2005 15:17:34 -0800 Subject: [PATCH] [PATCH] Driver core: only all userspace bind/unbind if CONFIG_HOTPLUG is enabled Thanks to drivers making their id tables __devinit, we can't allow userspace to bind or unbind drivers from devices manually through sysfs. So we only allow this if CONFIG_HOTPLUG is enabled. Cc: Dmitry Torokhov Signed-off-by: Greg Kroah-Hartman --- drivers/base/bus.c | 26 ++++++++++++++++++++++---- 1 file changed, 22 insertions(+), 4 deletions(-) diff --git a/drivers/base/bus.c b/drivers/base/bus.c index e3f915a2489..29f6af554e7 100644 --- a/drivers/base/bus.c +++ b/drivers/base/bus.c @@ -428,6 +428,26 @@ static void driver_remove_attrs(struct bus_type * bus, struct device_driver * dr } } +#ifdef CONFIG_HOTPLUG +/* + * Thanks to drivers making their tables __devinit, we can't allow manual + * bind and unbind from userspace unless CONFIG_HOTPLUG is enabled. + */ +static void add_bind_files(struct device_driver *drv) +{ + driver_create_file(drv, &driver_attr_unbind); + driver_create_file(drv, &driver_attr_bind); +} + +static void remove_bind_files(struct device_driver *drv) +{ + driver_remove_file(drv, &driver_attr_bind); + driver_remove_file(drv, &driver_attr_unbind); +} +#else +static inline void add_bind_files(struct device_driver *drv) {} +static inline void remove_bind_files(struct device_driver *drv) {} +#endif /** * bus_add_driver - Add a driver to the bus. @@ -457,8 +477,7 @@ int bus_add_driver(struct device_driver * drv) module_add_driver(drv->owner, drv); driver_add_attrs(bus, drv); - driver_create_file(drv, &driver_attr_unbind); - driver_create_file(drv, &driver_attr_bind); + add_bind_files(drv); } return error; } @@ -476,8 +495,7 @@ int bus_add_driver(struct device_driver * drv) void bus_remove_driver(struct device_driver * drv) { if (drv->bus) { - driver_remove_file(drv, &driver_attr_bind); - driver_remove_file(drv, &driver_attr_unbind); + remove_bind_files(drv); driver_remove_attrs(drv->bus, drv); klist_remove(&drv->knode_bus); pr_debug("bus %s: remove driver %s\n", drv->bus->name, drv->name); -- 2.41.0