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| author | Greg Kroah-Hartman <gregkh@suse.de> | 2005-12-13 15:17:34 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-01-04 16:18:09 -0800 |
| commit | 874c6241b2e49e52680d32a50d4909c7768d5cb9 (patch) | |
| tree | 815b08ab6793cd45346c3d5f6a3875f36c0bfc91 /drivers/base/bus.c | |
| parent | a96b204208443ab7e23c681f7ddabe807a741d0c (diff) | |
| download | linux-874c6241b2e49e52680d32a50d4909c7768d5cb9.tar.bz2 | |
[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 <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/base/bus.c')
| -rw-r--r-- | drivers/base/bus.c | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/drivers/base/bus.c b/drivers/base/bus.c index e3f915a24891..29f6af554e71 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); |