diff options
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/dd.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/base/dd.c b/drivers/base/dd.c index 6ea9c5cece71..e85705e84407 100644 --- a/drivers/base/dd.c +++ b/drivers/base/dd.c @@ -16,6 +16,7 @@ * Copyright (c) 2007-2009 Novell Inc. */ +#include <linux/debugfs.h> #include <linux/device.h> #include <linux/delay.h> #include <linux/dma-mapping.h> @@ -53,6 +54,7 @@ static DEFINE_MUTEX(deferred_probe_mutex); static LIST_HEAD(deferred_probe_pending_list); static LIST_HEAD(deferred_probe_active_list); static atomic_t deferred_trigger_count = ATOMIC_INIT(0); +static struct dentry *deferred_devices; /* * In some cases, like suspend to RAM or hibernation, It might be reasonable @@ -199,6 +201,24 @@ void device_unblock_probing(void) driver_deferred_probe_trigger(); } +/* + * deferred_devs_show() - Show the devices in the deferred probe pending list. + */ +static int deferred_devs_show(struct seq_file *s, void *data) +{ + struct device_private *curr; + + mutex_lock(&deferred_probe_mutex); + + list_for_each_entry(curr, &deferred_probe_pending_list, deferred_probe) + seq_printf(s, "%s\n", dev_name(curr->device)); + + mutex_unlock(&deferred_probe_mutex); + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(deferred_devs); + /** * deferred_probe_initcall() - Enable probing of deferred devices * @@ -208,6 +228,9 @@ void device_unblock_probing(void) */ static int deferred_probe_initcall(void) { + deferred_devices = debugfs_create_file("devices_deferred", 0444, NULL, + NULL, &deferred_devs_fops); + driver_deferred_probe_enable = true; driver_deferred_probe_trigger(); /* Sort as many dependencies as possible before exiting initcalls */ @@ -216,6 +239,12 @@ static int deferred_probe_initcall(void) } late_initcall(deferred_probe_initcall); +static void __exit deferred_probe_exit(void) +{ + debugfs_remove_recursive(deferred_devices); +} +__exitcall(deferred_probe_exit); + /** * device_is_bound() - Check if device is bound to a driver * @dev: device to check |