diff options
| -rw-r--r-- | arch/s390/include/asm/ccwgroup.h | 1 | ||||
| -rw-r--r-- | arch/s390/pci/pci_sysfs.c | 18 | ||||
| -rw-r--r-- | drivers/s390/block/dcssblk.c | 14 | ||||
| -rw-r--r-- | drivers/s390/cio/ccwgroup.c | 26 |
4 files changed, 32 insertions, 27 deletions
diff --git a/arch/s390/include/asm/ccwgroup.h b/arch/s390/include/asm/ccwgroup.h index 23723ce5ca7a..6e670f88d125 100644 --- a/arch/s390/include/asm/ccwgroup.h +++ b/arch/s390/include/asm/ccwgroup.h @@ -23,6 +23,7 @@ struct ccwgroup_device { unsigned int count; struct device dev; struct ccw_device *cdev[0]; + struct work_struct ungroup_work; }; /** diff --git a/arch/s390/pci/pci_sysfs.c b/arch/s390/pci/pci_sysfs.c index cf8a12ff733b..ab4a91393005 100644 --- a/arch/s390/pci/pci_sysfs.c +++ b/arch/s390/pci/pci_sysfs.c @@ -48,29 +48,27 @@ static ssize_t show_pfgid(struct device *dev, struct device_attribute *attr, } static DEVICE_ATTR(pfgid, S_IRUGO, show_pfgid, NULL); -static void recover_callback(struct device *dev) +static ssize_t store_recover(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) { struct pci_dev *pdev = to_pci_dev(dev); struct zpci_dev *zdev = get_zdev(pdev); int ret; + if (!device_remove_file_self(dev, attr)) + return count; + pci_stop_and_remove_bus_device(pdev); ret = zpci_disable_device(zdev); if (ret) - return; + return ret; ret = zpci_enable_device(zdev); if (ret) - return; + return ret; pci_rescan_bus(zdev->bus); -} - -static ssize_t store_recover(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) -{ - int rc = device_schedule_callback(dev, recover_callback); - return rc ? rc : count; + return count; } static DEVICE_ATTR(recover, S_IWUSR, NULL, store_recover); diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c index ebf41e228e55..ee0e85abe1fd 100644 --- a/drivers/s390/block/dcssblk.c +++ b/drivers/s390/block/dcssblk.c @@ -304,12 +304,6 @@ dcssblk_load_segment(char *name, struct segment_info **seg_info) return rc; } -static void dcssblk_unregister_callback(struct device *dev) -{ - device_unregister(dev); - put_device(dev); -} - /* * device attribute for switching shared/nonshared (exclusive) * operation (show + store) @@ -397,7 +391,13 @@ removeseg: blk_cleanup_queue(dev_info->dcssblk_queue); dev_info->gd->queue = NULL; put_disk(dev_info->gd); - rc = device_schedule_callback(dev, dcssblk_unregister_callback); + up_write(&dcssblk_devices_sem); + + if (device_remove_file_self(dev, attr)) { + device_unregister(dev); + put_device(dev); + } + return rc; out: up_write(&dcssblk_devices_sem); return rc; diff --git a/drivers/s390/cio/ccwgroup.c b/drivers/s390/cio/ccwgroup.c index fd3367a1dc7a..dfd7bc681c25 100644 --- a/drivers/s390/cio/ccwgroup.c +++ b/drivers/s390/cio/ccwgroup.c @@ -168,14 +168,12 @@ static ssize_t ccwgroup_online_show(struct device *dev, * Provide an 'ungroup' attribute so the user can remove group devices no * longer needed or accidentially created. Saves memory :) */ -static void ccwgroup_ungroup_callback(struct device *dev) +static void ccwgroup_ungroup(struct ccwgroup_device *gdev) { - struct ccwgroup_device *gdev = to_ccwgroupdev(dev); - mutex_lock(&gdev->reg_mutex); if (device_is_registered(&gdev->dev)) { __ccwgroup_remove_symlinks(gdev); - device_unregister(dev); + device_unregister(&gdev->dev); __ccwgroup_remove_cdev_refs(gdev); } mutex_unlock(&gdev->reg_mutex); @@ -195,10 +193,9 @@ static ssize_t ccwgroup_ungroup_store(struct device *dev, rc = -EINVAL; goto out; } - /* Note that we cannot unregister the device from one of its - * attribute methods, so we have to use this roundabout approach. - */ - rc = device_schedule_callback(dev, ccwgroup_ungroup_callback); + + if (device_remove_file_self(dev, attr)) + ccwgroup_ungroup(gdev); out: if (rc) { if (rc != -EAGAIN) @@ -224,6 +221,14 @@ static const struct attribute_group *ccwgroup_attr_groups[] = { NULL, }; +static void ccwgroup_ungroup_workfn(struct work_struct *work) +{ + struct ccwgroup_device *gdev = + container_of(work, struct ccwgroup_device, ungroup_work); + + ccwgroup_ungroup(gdev); +} + static void ccwgroup_release(struct device *dev) { kfree(to_ccwgroupdev(dev)); @@ -323,6 +328,7 @@ int ccwgroup_create_dev(struct device *parent, struct ccwgroup_driver *gdrv, atomic_set(&gdev->onoff, 0); mutex_init(&gdev->reg_mutex); mutex_lock(&gdev->reg_mutex); + INIT_WORK(&gdev->ungroup_work, ccwgroup_ungroup_workfn); gdev->count = num_devices; gdev->dev.bus = &ccwgroup_bus_type; gdev->dev.parent = parent; @@ -404,10 +410,10 @@ EXPORT_SYMBOL(ccwgroup_create_dev); static int ccwgroup_notifier(struct notifier_block *nb, unsigned long action, void *data) { - struct device *dev = data; + struct ccwgroup_device *gdev = to_ccwgroupdev(data); if (action == BUS_NOTIFY_UNBIND_DRIVER) - device_schedule_callback(dev, ccwgroup_ungroup_callback); + schedule_work(&gdev->ungroup_work); return NOTIFY_OK; } |