diff options
author | Greg Kroah-Hartman <gregkh@suse.de> | 2006-12-17 21:50:23 +0100 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-02-07 15:44:33 -0800 |
commit | 93bacefc4cc0b53e1cb6a336d43847154fdf6886 (patch) | |
tree | 4a82a9d2693d1165c58602a0bf4a8e5c76c541ef /drivers/usb/serial/bus.c | |
parent | 495a678fc62e850d15f860d39faee07ba0a8910c (diff) | |
download | kernel_samsung_aries-93bacefc4cc0b53e1cb6a336d43847154fdf6886.zip kernel_samsung_aries-93bacefc4cc0b53e1cb6a336d43847154fdf6886.tar.gz kernel_samsung_aries-93bacefc4cc0b53e1cb6a336d43847154fdf6886.tar.bz2 |
USB serial: add dynamic id support to usb-serial core
Thanks to Johannes Hölzl <johannes.hoelzl@gmx.de> for fixing a few
things and getting it all working properly.
This adds support for dynamic usb ids to the usb serial core. The file
"new_id" will show up under the usb serial driver, not the usb driver
associated with the usb-serial driver (yeah, it can be a bit confusing
at first glance...)
This patch also modifies the USB core to allow the usb-serial core to
reuse much of the dynamic id logic.
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Johannes Hölzl <johannes.hoelzl@gmx.de>
Diffstat (limited to 'drivers/usb/serial/bus.c')
-rw-r--r-- | drivers/usb/serial/bus.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/drivers/usb/serial/bus.c b/drivers/usb/serial/bus.c index 6542f22..c08a384 100644 --- a/drivers/usb/serial/bus.c +++ b/drivers/usb/serial/bus.c @@ -103,11 +103,52 @@ exit: return retval; } +#ifdef CONFIG_HOTPLUG +static ssize_t store_new_id(struct device_driver *driver, + const char *buf, size_t count) +{ + struct usb_serial_driver *usb_drv = to_usb_serial_driver(driver); + ssize_t retval = usb_store_new_id(&usb_drv->dynids, driver, buf, count); + + if (retval >= 0 && usb_drv->usb_driver != NULL) + retval = usb_store_new_id(&usb_drv->usb_driver->dynids, + &usb_drv->usb_driver->drvwrap.driver, + buf, count); + return retval; +} + +static struct driver_attribute drv_attrs[] = { + __ATTR(new_id, S_IWUSR, NULL, store_new_id), + __ATTR_NULL, +}; + +static void free_dynids(struct usb_serial_driver *drv) +{ + struct usb_dynid *dynid, *n; + + spin_lock(&drv->dynids.lock); + list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { + list_del(&dynid->node); + kfree(dynid); + } + spin_unlock(&drv->dynids.lock); +} + +#else +static struct driver_attribute drv_attrs[] = { + __ATTR_NULL, +}; +static inline void free_dynids(struct usb_driver *drv) +{ +} +#endif + struct bus_type usb_serial_bus_type = { .name = "usb-serial", .match = usb_serial_device_match, .probe = usb_serial_device_probe, .remove = usb_serial_device_remove, + .drv_attrs = drv_attrs, }; int usb_serial_bus_register(struct usb_serial_driver *driver) @@ -115,6 +156,9 @@ int usb_serial_bus_register(struct usb_serial_driver *driver) int retval; driver->driver.bus = &usb_serial_bus_type; + spin_lock_init(&driver->dynids.lock); + INIT_LIST_HEAD(&driver->dynids.list); + retval = driver_register(&driver->driver); return retval; @@ -122,6 +166,7 @@ int usb_serial_bus_register(struct usb_serial_driver *driver) void usb_serial_bus_deregister(struct usb_serial_driver *driver) { + free_dynids(driver); driver_unregister(&driver->driver); } |