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https://github.com/torvalds/linux.git
synced 2024-10-31 17:21:49 +00:00
[S390] ccwgroup: cleanup
Fix coding style, remove forward declerations, simplify code. Also remove a superfluous get_device/put_device pair in ccwgroup_create_from_string. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
parent
dbdf1afcaa
commit
dad572e370
@ -29,31 +29,20 @@
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/* a device matches a driver if all its slave devices match the same
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/* a device matches a driver if all its slave devices match the same
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* entry of the driver */
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* entry of the driver */
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static int
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static int ccwgroup_bus_match(struct device *dev, struct device_driver * drv)
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ccwgroup_bus_match (struct device * dev, struct device_driver * drv)
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{
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{
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struct ccwgroup_device *gdev;
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struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
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struct ccwgroup_driver *gdrv;
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struct ccwgroup_driver *gdrv = to_ccwgroupdrv(drv);
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gdev = to_ccwgroupdev(dev);
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gdrv = to_ccwgroupdrv(drv);
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if (gdev->creator_id == gdrv->driver_id)
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if (gdev->creator_id == gdrv->driver_id)
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return 1;
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return 1;
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return 0;
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return 0;
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}
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}
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static int
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ccwgroup_uevent (struct device *dev, struct kobj_uevent_env *env)
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{
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/* TODO */
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return 0;
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}
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static struct bus_type ccwgroup_bus_type;
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static struct bus_type ccwgroup_bus_type;
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static void
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static void __ccwgroup_remove_symlinks(struct ccwgroup_device *gdev)
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__ccwgroup_remove_symlinks(struct ccwgroup_device *gdev)
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{
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{
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int i;
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int i;
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char str[8];
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char str[8];
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@ -63,7 +52,6 @@ __ccwgroup_remove_symlinks(struct ccwgroup_device *gdev)
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sysfs_remove_link(&gdev->dev.kobj, str);
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sysfs_remove_link(&gdev->dev.kobj, str);
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sysfs_remove_link(&gdev->cdev[i]->dev.kobj, "group_device");
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sysfs_remove_link(&gdev->cdev[i]->dev.kobj, "group_device");
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}
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}
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}
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}
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/*
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/*
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@ -87,12 +75,87 @@ static void __ccwgroup_remove_cdev_refs(struct ccwgroup_device *gdev)
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}
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}
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}
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}
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static int ccwgroup_set_online(struct ccwgroup_device *gdev)
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{
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struct ccwgroup_driver *gdrv = to_ccwgroupdrv(gdev->dev.driver);
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int ret = 0;
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if (atomic_cmpxchg(&gdev->onoff, 0, 1) != 0)
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return -EAGAIN;
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if (gdev->state == CCWGROUP_ONLINE)
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goto out;
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if (gdrv->set_online)
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ret = gdrv->set_online(gdev);
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if (ret)
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goto out;
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gdev->state = CCWGROUP_ONLINE;
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out:
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atomic_set(&gdev->onoff, 0);
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return ret;
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}
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static int ccwgroup_set_offline(struct ccwgroup_device *gdev)
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{
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struct ccwgroup_driver *gdrv = to_ccwgroupdrv(gdev->dev.driver);
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int ret = 0;
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if (atomic_cmpxchg(&gdev->onoff, 0, 1) != 0)
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return -EAGAIN;
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if (gdev->state == CCWGROUP_OFFLINE)
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goto out;
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if (gdrv->set_offline)
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ret = gdrv->set_offline(gdev);
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if (ret)
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goto out;
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gdev->state = CCWGROUP_OFFLINE;
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out:
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atomic_set(&gdev->onoff, 0);
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return ret;
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}
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static ssize_t ccwgroup_online_store(struct device *dev,
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static ssize_t ccwgroup_online_store(struct device *dev,
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struct device_attribute *attr,
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struct device_attribute *attr,
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const char *buf, size_t count);
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const char *buf, size_t count)
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{
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struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
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struct ccwgroup_driver *gdrv = to_ccwgroupdrv(dev->driver);
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unsigned long value;
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int ret;
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if (!dev->driver)
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return -EINVAL;
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if (!try_module_get(gdrv->driver.owner))
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return -EINVAL;
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ret = strict_strtoul(buf, 0, &value);
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if (ret)
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goto out;
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if (value == 1)
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ret = ccwgroup_set_online(gdev);
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else if (value == 0)
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ret = ccwgroup_set_offline(gdev);
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else
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ret = -EINVAL;
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out:
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module_put(gdrv->driver.owner);
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return (ret == 0) ? count : ret;
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}
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static ssize_t ccwgroup_online_show(struct device *dev,
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static ssize_t ccwgroup_online_show(struct device *dev,
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struct device_attribute *attr,
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struct device_attribute *attr,
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char *buf);
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char *buf)
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{
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struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
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int online;
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online = (gdev->state == CCWGROUP_ONLINE) ? 1 : 0;
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return scnprintf(buf, PAGE_SIZE, "%d\n", online);
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}
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/*
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/*
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* Provide an 'ungroup' attribute so the user can remove group devices no
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* Provide an 'ungroup' attribute so the user can remove group devices no
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* longer needed or accidentially created. Saves memory :)
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* longer needed or accidentially created. Saves memory :)
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@ -110,14 +173,13 @@ static void ccwgroup_ungroup_callback(struct device *dev)
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mutex_unlock(&gdev->reg_mutex);
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mutex_unlock(&gdev->reg_mutex);
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}
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}
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static ssize_t
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static ssize_t ccwgroup_ungroup_store(struct device *dev,
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ccwgroup_ungroup_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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{
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struct ccwgroup_device *gdev;
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struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
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int rc;
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int rc;
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gdev = to_ccwgroupdev(dev);
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/* Prevent concurrent online/offline processing and ungrouping. */
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/* Prevent concurrent online/offline processing and ungrouping. */
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if (atomic_cmpxchg(&gdev->onoff, 0, 1) != 0)
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if (atomic_cmpxchg(&gdev->onoff, 0, 1) != 0)
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return -EAGAIN;
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return -EAGAIN;
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@ -138,7 +200,6 @@ out:
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}
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}
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return count;
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return count;
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}
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}
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static DEVICE_ATTR(ungroup, 0200, NULL, ccwgroup_ungroup_store);
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static DEVICE_ATTR(ungroup, 0200, NULL, ccwgroup_ungroup_store);
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static DEVICE_ATTR(online, 0644, ccwgroup_online_show, ccwgroup_online_store);
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static DEVICE_ATTR(online, 0644, ccwgroup_online_show, ccwgroup_online_store);
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@ -155,21 +216,19 @@ static const struct attribute_group *ccwgroup_attr_groups[] = {
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NULL,
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NULL,
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};
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};
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static void
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static void ccwgroup_release(struct device *dev)
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ccwgroup_release (struct device *dev)
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{
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{
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kfree(to_ccwgroupdev(dev));
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kfree(to_ccwgroupdev(dev));
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}
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}
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static int
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static int __ccwgroup_create_symlinks(struct ccwgroup_device *gdev)
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__ccwgroup_create_symlinks(struct ccwgroup_device *gdev)
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{
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{
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char str[8];
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char str[8];
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int i, rc;
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int i, rc;
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for (i = 0; i < gdev->count; i++) {
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for (i = 0; i < gdev->count; i++) {
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rc = sysfs_create_link(&gdev->cdev[i]->dev.kobj, &gdev->dev.kobj,
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rc = sysfs_create_link(&gdev->cdev[i]->dev.kobj,
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"group_device");
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&gdev->dev.kobj, "group_device");
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if (rc) {
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if (rc) {
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for (--i; i >= 0; i--)
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for (--i; i >= 0; i--)
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sysfs_remove_link(&gdev->cdev[i]->dev.kobj,
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sysfs_remove_link(&gdev->cdev[i]->dev.kobj,
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@ -179,8 +238,8 @@ __ccwgroup_create_symlinks(struct ccwgroup_device *gdev)
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}
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}
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for (i = 0; i < gdev->count; i++) {
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for (i = 0; i < gdev->count; i++) {
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sprintf(str, "cdev%d", i);
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sprintf(str, "cdev%d", i);
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rc = sysfs_create_link(&gdev->dev.kobj, &gdev->cdev[i]->dev.kobj,
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rc = sysfs_create_link(&gdev->dev.kobj,
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str);
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&gdev->cdev[i]->dev.kobj, str);
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if (rc) {
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if (rc) {
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for (--i; i >= 0; i--) {
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for (--i; i >= 0; i--) {
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sprintf(str, "cdev%d", i);
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sprintf(str, "cdev%d", i);
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@ -317,14 +376,13 @@ int ccwgroup_create_from_string(struct device *root, unsigned int creator_id,
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rc = device_add(&gdev->dev);
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rc = device_add(&gdev->dev);
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if (rc)
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if (rc)
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goto error;
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goto error;
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get_device(&gdev->dev);
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rc = __ccwgroup_create_symlinks(gdev);
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rc = __ccwgroup_create_symlinks(gdev);
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if (!rc) {
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if (rc) {
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mutex_unlock(&gdev->reg_mutex);
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device_del(&gdev->dev);
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put_device(&gdev->dev);
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goto error;
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return 0;
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}
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}
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device_unregister(&gdev->dev);
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mutex_unlock(&gdev->reg_mutex);
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return 0;
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error:
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error:
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for (i = 0; i < num_devices; i++)
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for (i = 0; i < num_devices; i++)
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if (gdev->cdev[i]) {
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if (gdev->cdev[i]) {
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@ -342,7 +400,15 @@ error:
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EXPORT_SYMBOL(ccwgroup_create_from_string);
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EXPORT_SYMBOL(ccwgroup_create_from_string);
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static int ccwgroup_notifier(struct notifier_block *nb, unsigned long action,
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static int ccwgroup_notifier(struct notifier_block *nb, unsigned long action,
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void *data);
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void *data)
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{
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struct device *dev = data;
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if (action == BUS_NOTIFY_UNBIND_DRIVER)
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device_schedule_callback(dev, ccwgroup_ungroup_callback);
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return NOTIFY_OK;
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}
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static struct notifier_block ccwgroup_nb = {
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static struct notifier_block ccwgroup_nb = {
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.notifier_call = ccwgroup_notifier
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.notifier_call = ccwgroup_notifier
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@ -374,128 +440,21 @@ module_exit(cleanup_ccwgroup);
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/************************** driver stuff ******************************/
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/************************** driver stuff ******************************/
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static int
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static int ccwgroup_probe(struct device *dev)
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ccwgroup_set_online(struct ccwgroup_device *gdev)
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{
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{
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struct ccwgroup_driver *gdrv;
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struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
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int ret;
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struct ccwgroup_driver *gdrv = to_ccwgroupdrv(dev->driver);
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if (atomic_cmpxchg(&gdev->onoff, 0, 1) != 0)
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return gdrv->probe ? gdrv->probe(gdev) : -ENODEV;
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return -EAGAIN;
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if (gdev->state == CCWGROUP_ONLINE) {
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ret = 0;
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goto out;
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}
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if (!gdev->dev.driver) {
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ret = -EINVAL;
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goto out;
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}
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gdrv = to_ccwgroupdrv (gdev->dev.driver);
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if ((ret = gdrv->set_online ? gdrv->set_online(gdev) : 0))
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goto out;
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gdev->state = CCWGROUP_ONLINE;
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out:
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atomic_set(&gdev->onoff, 0);
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return ret;
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}
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}
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static int
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static int ccwgroup_remove(struct device *dev)
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ccwgroup_set_offline(struct ccwgroup_device *gdev)
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{
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{
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struct ccwgroup_driver *gdrv;
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struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
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int ret;
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struct ccwgroup_driver *gdrv = to_ccwgroupdrv(dev->driver);
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if (atomic_cmpxchg(&gdev->onoff, 0, 1) != 0)
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return -EAGAIN;
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if (gdev->state == CCWGROUP_OFFLINE) {
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ret = 0;
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goto out;
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}
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if (!gdev->dev.driver) {
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ret = -EINVAL;
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goto out;
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}
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gdrv = to_ccwgroupdrv (gdev->dev.driver);
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if ((ret = gdrv->set_offline ? gdrv->set_offline(gdev) : 0))
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goto out;
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gdev->state = CCWGROUP_OFFLINE;
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out:
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atomic_set(&gdev->onoff, 0);
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return ret;
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}
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static ssize_t
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ccwgroup_online_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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{
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struct ccwgroup_device *gdev;
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struct ccwgroup_driver *gdrv;
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unsigned long value;
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int ret;
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if (!dev->driver)
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return -EINVAL;
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gdev = to_ccwgroupdev(dev);
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gdrv = to_ccwgroupdrv(dev->driver);
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if (!try_module_get(gdrv->driver.owner))
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return -EINVAL;
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ret = strict_strtoul(buf, 0, &value);
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if (ret)
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goto out;
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if (value == 1)
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ret = ccwgroup_set_online(gdev);
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else if (value == 0)
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ret = ccwgroup_set_offline(gdev);
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else
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ret = -EINVAL;
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out:
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module_put(gdrv->driver.owner);
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return (ret == 0) ? count : ret;
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}
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static ssize_t
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ccwgroup_online_show (struct device *dev, struct device_attribute *attr, char *buf)
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{
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int online;
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online = (to_ccwgroupdev(dev)->state == CCWGROUP_ONLINE);
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return sprintf(buf, online ? "1\n" : "0\n");
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}
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static int
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ccwgroup_probe (struct device *dev)
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{
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struct ccwgroup_device *gdev;
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struct ccwgroup_driver *gdrv;
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int ret;
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gdev = to_ccwgroupdev(dev);
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gdrv = to_ccwgroupdrv(dev->driver);
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ret = gdrv->probe ? gdrv->probe(gdev) : -ENODEV;
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return ret;
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}
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static int
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|
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ccwgroup_remove (struct device *dev)
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|
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{
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|
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struct ccwgroup_device *gdev;
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|
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struct ccwgroup_driver *gdrv;
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|
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if (!dev->driver)
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if (!dev->driver)
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return 0;
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return 0;
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gdev = to_ccwgroupdev(dev);
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|
||||||
gdrv = to_ccwgroupdrv(dev->driver);
|
|
||||||
|
|
||||||
if (gdrv->remove)
|
if (gdrv->remove)
|
||||||
gdrv->remove(gdev);
|
gdrv->remove(gdev);
|
||||||
|
|
||||||
@ -504,15 +463,11 @@ ccwgroup_remove (struct device *dev)
|
|||||||
|
|
||||||
static void ccwgroup_shutdown(struct device *dev)
|
static void ccwgroup_shutdown(struct device *dev)
|
||||||
{
|
{
|
||||||
struct ccwgroup_device *gdev;
|
struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
|
||||||
struct ccwgroup_driver *gdrv;
|
struct ccwgroup_driver *gdrv = to_ccwgroupdrv(dev->driver);
|
||||||
|
|
||||||
if (!dev->driver)
|
if (!dev->driver)
|
||||||
return;
|
return;
|
||||||
|
|
||||||
gdev = to_ccwgroupdev(dev);
|
|
||||||
gdrv = to_ccwgroupdrv(dev->driver);
|
|
||||||
|
|
||||||
if (gdrv->shutdown)
|
if (gdrv->shutdown)
|
||||||
gdrv->shutdown(gdev);
|
gdrv->shutdown(gdev);
|
||||||
}
|
}
|
||||||
@ -588,26 +543,12 @@ static const struct dev_pm_ops ccwgroup_pm_ops = {
|
|||||||
static struct bus_type ccwgroup_bus_type = {
|
static struct bus_type ccwgroup_bus_type = {
|
||||||
.name = "ccwgroup",
|
.name = "ccwgroup",
|
||||||
.match = ccwgroup_bus_match,
|
.match = ccwgroup_bus_match,
|
||||||
.uevent = ccwgroup_uevent,
|
|
||||||
.probe = ccwgroup_probe,
|
.probe = ccwgroup_probe,
|
||||||
.remove = ccwgroup_remove,
|
.remove = ccwgroup_remove,
|
||||||
.shutdown = ccwgroup_shutdown,
|
.shutdown = ccwgroup_shutdown,
|
||||||
.pm = &ccwgroup_pm_ops,
|
.pm = &ccwgroup_pm_ops,
|
||||||
};
|
};
|
||||||
|
|
||||||
|
|
||||||
static int ccwgroup_notifier(struct notifier_block *nb, unsigned long action,
|
|
||||||
void *data)
|
|
||||||
{
|
|
||||||
struct device *dev = data;
|
|
||||||
|
|
||||||
if (action == BUS_NOTIFY_UNBIND_DRIVER)
|
|
||||||
device_schedule_callback(dev, ccwgroup_ungroup_callback);
|
|
||||||
|
|
||||||
return NOTIFY_OK;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/**
|
/**
|
||||||
* ccwgroup_driver_register() - register a ccw group driver
|
* ccwgroup_driver_register() - register a ccw group driver
|
||||||
* @cdriver: driver to be registered
|
* @cdriver: driver to be registered
|
||||||
@ -621,9 +562,9 @@ int ccwgroup_driver_register(struct ccwgroup_driver *cdriver)
|
|||||||
|
|
||||||
return driver_register(&cdriver->driver);
|
return driver_register(&cdriver->driver);
|
||||||
}
|
}
|
||||||
|
EXPORT_SYMBOL(ccwgroup_driver_register);
|
||||||
|
|
||||||
static int
|
static int __ccwgroup_match_all(struct device *dev, void *data)
|
||||||
__ccwgroup_match_all(struct device *dev, void *data)
|
|
||||||
{
|
{
|
||||||
return 1;
|
return 1;
|
||||||
}
|
}
|
||||||
@ -654,6 +595,7 @@ void ccwgroup_driver_unregister(struct ccwgroup_driver *cdriver)
|
|||||||
put_driver(&cdriver->driver);
|
put_driver(&cdriver->driver);
|
||||||
driver_unregister(&cdriver->driver);
|
driver_unregister(&cdriver->driver);
|
||||||
}
|
}
|
||||||
|
EXPORT_SYMBOL(ccwgroup_driver_unregister);
|
||||||
|
|
||||||
/**
|
/**
|
||||||
* ccwgroup_probe_ccwdev() - probe function for slave devices
|
* ccwgroup_probe_ccwdev() - probe function for slave devices
|
||||||
@ -668,6 +610,7 @@ int ccwgroup_probe_ccwdev(struct ccw_device *cdev)
|
|||||||
{
|
{
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
EXPORT_SYMBOL(ccwgroup_probe_ccwdev);
|
||||||
|
|
||||||
/**
|
/**
|
||||||
* ccwgroup_remove_ccwdev() - remove function for slave devices
|
* ccwgroup_remove_ccwdev() - remove function for slave devices
|
||||||
@ -704,9 +647,5 @@ void ccwgroup_remove_ccwdev(struct ccw_device *cdev)
|
|||||||
/* Release ccwgroup device reference for local processing. */
|
/* Release ccwgroup device reference for local processing. */
|
||||||
put_device(&gdev->dev);
|
put_device(&gdev->dev);
|
||||||
}
|
}
|
||||||
|
|
||||||
MODULE_LICENSE("GPL");
|
|
||||||
EXPORT_SYMBOL(ccwgroup_driver_register);
|
|
||||||
EXPORT_SYMBOL(ccwgroup_driver_unregister);
|
|
||||||
EXPORT_SYMBOL(ccwgroup_probe_ccwdev);
|
|
||||||
EXPORT_SYMBOL(ccwgroup_remove_ccwdev);
|
EXPORT_SYMBOL(ccwgroup_remove_ccwdev);
|
||||||
|
MODULE_LICENSE("GPL");
|
||||||
|
Loading…
Reference in New Issue
Block a user