diff options
| -rw-r--r-- | drivers/base/base.h | 1 | ||||
| -rw-r--r-- | drivers/base/core.c | 44 | ||||
| -rw-r--r-- | drivers/base/dd.c | 5 | ||||
| -rw-r--r-- | include/linux/device.h | 5 |
4 files changed, 35 insertions, 20 deletions
diff --git a/drivers/base/base.h b/drivers/base/base.h index 95c22c0f9036..40fb069a8a7e 100644 --- a/drivers/base/base.h +++ b/drivers/base/base.h @@ -153,7 +153,6 @@ extern char *make_class_name(const char *name, struct kobject *kobj); extern int devres_release_all(struct device *dev); extern void device_block_probing(void); extern void device_unblock_probing(void); -extern void driver_deferred_probe_force_trigger(void); /* /sys/devices directory */ extern struct kset *devices_kset; diff --git a/drivers/base/core.c b/drivers/base/core.c index 67d39a90b45c..05d414e9e8a4 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -50,6 +50,7 @@ static DEFINE_MUTEX(wfs_lock); static LIST_HEAD(deferred_sync); static unsigned int defer_sync_state_count = 1; static unsigned int defer_fw_devlink_count; +static LIST_HEAD(deferred_fw_devlink); static DEFINE_MUTEX(defer_fw_devlink_lock); static bool fw_devlink_is_permissive(void); @@ -754,11 +755,11 @@ static void __device_links_queue_sync_state(struct device *dev, */ dev->state_synced = true; - if (WARN_ON(!list_empty(&dev->links.defer_sync))) + if (WARN_ON(!list_empty(&dev->links.defer_hook))) return; get_device(dev); - list_add_tail(&dev->links.defer_sync, list); + list_add_tail(&dev->links.defer_hook, list); } /** @@ -776,8 +777,8 @@ static void device_links_flush_sync_list(struct list_head *list, { struct device *dev, *tmp; - list_for_each_entry_safe(dev, tmp, list, links.defer_sync) { - list_del_init(&dev->links.defer_sync); + list_for_each_entry_safe(dev, tmp, list, links.defer_hook) { + list_del_init(&dev->links.defer_hook); if (dev != dont_lock_dev) device_lock(dev); @@ -815,12 +816,12 @@ void device_links_supplier_sync_state_resume(void) if (defer_sync_state_count) goto out; - list_for_each_entry_safe(dev, tmp, &deferred_sync, links.defer_sync) { + list_for_each_entry_safe(dev, tmp, &deferred_sync, links.defer_hook) { /* * Delete from deferred_sync list before queuing it to - * sync_list because defer_sync is used for both lists. + * sync_list because defer_hook is used for both lists. */ - list_del_init(&dev->links.defer_sync); + list_del_init(&dev->links.defer_hook); __device_links_queue_sync_state(dev, &sync_list); } out: @@ -838,8 +839,8 @@ late_initcall(sync_state_resume_initcall); static void __device_links_supplier_defer_sync(struct device *sup) { - if (list_empty(&sup->links.defer_sync) && dev_has_sync_state(sup)) - list_add_tail(&sup->links.defer_sync, &deferred_sync); + if (list_empty(&sup->links.defer_hook) && dev_has_sync_state(sup)) + list_add_tail(&sup->links.defer_hook, &deferred_sync); } static void device_link_drop_managed(struct device_link *link) @@ -1052,7 +1053,7 @@ void device_links_driver_cleanup(struct device *dev) WRITE_ONCE(link->status, DL_STATE_DORMANT); } - list_del_init(&dev->links.defer_sync); + list_del_init(&dev->links.defer_hook); __device_links_no_driver(dev); device_links_write_unlock(); @@ -1244,6 +1245,12 @@ static void fw_devlink_link_device(struct device *dev) fw_ret = -EAGAIN; } else { fw_ret = -ENODEV; + /* + * defer_hook is not used to add device to deferred_sync list + * until device is bound. Since deferred fw devlink also blocks + * probing, same list hook can be used for deferred_fw_devlink. + */ + list_add_tail(&dev->links.defer_hook, &deferred_fw_devlink); } if (fw_ret == -ENODEV) @@ -1312,6 +1319,9 @@ void fw_devlink_pause(void) */ void fw_devlink_resume(void) { + struct device *dev, *tmp; + LIST_HEAD(probe_list); + mutex_lock(&defer_fw_devlink_lock); if (!defer_fw_devlink_count) { WARN(true, "Unmatched fw_devlink pause/resume!"); @@ -1323,9 +1333,19 @@ void fw_devlink_resume(void) goto out; device_link_add_missing_supplier_links(); - driver_deferred_probe_force_trigger(); + list_splice_tail_init(&deferred_fw_devlink, &probe_list); out: mutex_unlock(&defer_fw_devlink_lock); + + /* + * bus_probe_device() can cause new devices to get added and they'll + * try to grab defer_fw_devlink_lock. So, this needs to be done outside + * the defer_fw_devlink_lock. + */ + list_for_each_entry_safe(dev, tmp, &probe_list, links.defer_hook) { + list_del_init(&dev->links.defer_hook); + bus_probe_device(dev); + } } /* Device links support end. */ @@ -2172,7 +2192,7 @@ void device_initialize(struct device *dev) INIT_LIST_HEAD(&dev->links.consumers); INIT_LIST_HEAD(&dev->links.suppliers); INIT_LIST_HEAD(&dev->links.needs_suppliers); - INIT_LIST_HEAD(&dev->links.defer_sync); + INIT_LIST_HEAD(&dev->links.defer_hook); dev->links.status = DL_DEV_NO_DRIVER; } EXPORT_SYMBOL_GPL(device_initialize); diff --git a/drivers/base/dd.c b/drivers/base/dd.c index 9a1d940342ac..48ca81cb8ebc 100644 --- a/drivers/base/dd.c +++ b/drivers/base/dd.c @@ -164,11 +164,6 @@ static void driver_deferred_probe_trigger(void) if (!driver_deferred_probe_enable) return; - driver_deferred_probe_force_trigger(); -} - -void driver_deferred_probe_force_trigger(void) -{ /* * A successful probe means that all the devices in the pending list * should be triggered to be reprobed. Move all the deferred devices diff --git a/include/linux/device.h b/include/linux/device.h index 15460a5ac024..5efed864b387 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -433,7 +433,8 @@ enum dl_dev_state { * @suppliers: List of links to supplier devices. * @consumers: List of links to consumer devices. * @needs_suppliers: Hook to global list of devices waiting for suppliers. - * @defer_sync: Hook to global list of devices that have deferred sync_state. + * @defer_hook: Hook to global list of devices that have deferred sync_state or + * deferred fw_devlink. * @need_for_probe: If needs_suppliers is on a list, this indicates if the * suppliers are needed for probe or not. * @status: Driver status information. @@ -442,7 +443,7 @@ struct dev_links_info { struct list_head suppliers; struct list_head consumers; struct list_head needs_suppliers; - struct list_head defer_sync; + struct list_head defer_hook; bool need_for_probe; enum dl_dev_state status; }; |