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path: root/drivers/base/dd.c
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-rw-r--r--drivers/base/dd.c40
1 files changed, 17 insertions, 23 deletions
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 135231239103..f17c3266a0e0 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -30,7 +30,7 @@
30 30
31static void driver_bound(struct device *dev) 31static void driver_bound(struct device *dev)
32{ 32{
33 if (klist_node_attached(&dev->knode_driver)) { 33 if (klist_node_attached(&dev->p->knode_driver)) {
34 printk(KERN_WARNING "%s: device %s already bound\n", 34 printk(KERN_WARNING "%s: device %s already bound\n",
35 __func__, kobject_name(&dev->kobj)); 35 __func__, kobject_name(&dev->kobj));
36 return; 36 return;
@@ -43,7 +43,7 @@ static void driver_bound(struct device *dev)
43 blocking_notifier_call_chain(&dev->bus->p->bus_notifier, 43 blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
44 BUS_NOTIFY_BOUND_DRIVER, dev); 44 BUS_NOTIFY_BOUND_DRIVER, dev);
45 45
46 klist_add_tail(&dev->knode_driver, &dev->driver->p->klist_devices); 46 klist_add_tail(&dev->p->knode_driver, &dev->driver->p->klist_devices);
47} 47}
48 48
49static int driver_sysfs_add(struct device *dev) 49static int driver_sysfs_add(struct device *dev)
@@ -172,16 +172,12 @@ int driver_probe_done(void)
172/** 172/**
173 * wait_for_device_probe 173 * wait_for_device_probe
174 * Wait for device probing to be completed. 174 * Wait for device probing to be completed.
175 *
176 * Note: this function polls at 100 msec intervals.
177 */ 175 */
178int wait_for_device_probe(void) 176void wait_for_device_probe(void)
179{ 177{
180 /* wait for the known devices to complete their probing */ 178 /* wait for the known devices to complete their probing */
181 while (driver_probe_done() != 0) 179 wait_event(probe_waitqueue, atomic_read(&probe_count) == 0);
182 msleep(100);
183 async_synchronize_full(); 180 async_synchronize_full();
184 return 0;
185} 181}
186 182
187/** 183/**
@@ -189,14 +185,8 @@ int wait_for_device_probe(void)
189 * @drv: driver to bind a device to 185 * @drv: driver to bind a device to
190 * @dev: device to try to bind to the driver 186 * @dev: device to try to bind to the driver
191 * 187 *
192 * First, we call the bus's match function, if one present, which should 188 * This function returns -ENODEV if the device is not registered,
193 * compare the device IDs the driver supports with the device IDs of the 189 * 1 if the device is bound sucessfully and 0 otherwise.
194 * device. Note we don't do this ourselves because we don't know the
195 * format of the ID structures, nor what is to be considered a match and
196 * what is not.
197 *
198 * This function returns 1 if a match is found, -ENODEV if the device is
199 * not registered, and 0 otherwise.
200 * 190 *
201 * This function must be called with @dev->sem held. When called for a 191 * This function must be called with @dev->sem held. When called for a
202 * USB interface, @dev->parent->sem must be held as well. 192 * USB interface, @dev->parent->sem must be held as well.
@@ -207,21 +197,22 @@ int driver_probe_device(struct device_driver *drv, struct device *dev)
207 197
208 if (!device_is_registered(dev)) 198 if (!device_is_registered(dev))
209 return -ENODEV; 199 return -ENODEV;
210 if (drv->bus->match && !drv->bus->match(dev, drv))
211 goto done;
212 200
213 pr_debug("bus: '%s': %s: matched device %s with driver %s\n", 201 pr_debug("bus: '%s': %s: matched device %s with driver %s\n",
214 drv->bus->name, __func__, dev_name(dev), drv->name); 202 drv->bus->name, __func__, dev_name(dev), drv->name);
215 203
216 ret = really_probe(dev, drv); 204 ret = really_probe(dev, drv);
217 205
218done:
219 return ret; 206 return ret;
220} 207}
221 208
222static int __device_attach(struct device_driver *drv, void *data) 209static int __device_attach(struct device_driver *drv, void *data)
223{ 210{
224 struct device *dev = data; 211 struct device *dev = data;
212
213 if (!driver_match_device(drv, dev))
214 return 0;
215
225 return driver_probe_device(drv, dev); 216 return driver_probe_device(drv, dev);
226} 217}
227 218
@@ -274,7 +265,7 @@ static int __driver_attach(struct device *dev, void *data)
274 * is an error. 265 * is an error.
275 */ 266 */
276 267
277 if (drv->bus->match && !drv->bus->match(dev, drv)) 268 if (!driver_match_device(drv, dev))
278 return 0; 269 return 0;
279 270
280 if (dev->parent) /* Needed for USB */ 271 if (dev->parent) /* Needed for USB */
@@ -327,7 +318,7 @@ static void __device_release_driver(struct device *dev)
327 drv->remove(dev); 318 drv->remove(dev);
328 devres_release_all(dev); 319 devres_release_all(dev);
329 dev->driver = NULL; 320 dev->driver = NULL;
330 klist_remove(&dev->knode_driver); 321 klist_remove(&dev->p->knode_driver);
331 } 322 }
332} 323}
333 324
@@ -357,6 +348,7 @@ EXPORT_SYMBOL_GPL(device_release_driver);
357 */ 348 */
358void driver_detach(struct device_driver *drv) 349void driver_detach(struct device_driver *drv)
359{ 350{
351 struct device_private *dev_prv;
360 struct device *dev; 352 struct device *dev;
361 353
362 for (;;) { 354 for (;;) {
@@ -365,8 +357,10 @@ void driver_detach(struct device_driver *drv)
365 spin_unlock(&drv->p->klist_devices.k_lock); 357 spin_unlock(&drv->p->klist_devices.k_lock);
366 break; 358 break;
367 } 359 }
368 dev = list_entry(drv->p->klist_devices.k_list.prev, 360 dev_prv = list_entry(drv->p->klist_devices.k_list.prev,
369 struct device, knode_driver.n_node); 361 struct device_private,
362 knode_driver.n_node);
363 dev = dev_prv->device;
370 get_device(dev); 364 get_device(dev);
371 spin_unlock(&drv->p->klist_devices.k_lock); 365 spin_unlock(&drv->p->klist_devices.k_lock);
372 366