linux-imx
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committed 1ea61b68d0fx
* The deferred_probe_mutex must be held any time the deferred_probe_*_list * of the (struct device*)->p->deferred_probe pointers are manipulated */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;static bool initcalls_done;/* Save the async probe drivers' name from kernel cmdline */#define ASYNC_DRV_NAMES_MAX_LEN 256static char async_probe_drv_names[ASYNC_DRV_NAMES_MAX_LEN];/* * In some cases, like suspend to RAM or hibernation, It might be reasonable * to prohibit probing of devices as it could be unsafe. * Once defer_all_probes is true all drivers probes will be forcibly deferred. */static bool defer_all_probes;/* * deferred_probe_work_func() - Retry probing devices in the active list. */ ret = really_probe(dev, drv); pm_request_idle(dev); if (dev->parent) pm_runtime_put(dev->parent); pm_runtime_put_suppliers(dev); return ret;}static inline bool cmdline_requested_async_probing(const char *drv_name){ return parse_option_str(async_probe_drv_names, drv_name);}/* The option format is "driver_async_probe=drv_name1,drv_name2,..." */static int __init save_async_options(char *buf){ if (strlen(buf) >= ASYNC_DRV_NAMES_MAX_LEN) printk(KERN_WARNING "Too long list of driver names for 'driver_async_probe'!\n"); strlcpy(async_probe_drv_names, buf, ASYNC_DRV_NAMES_MAX_LEN); return 0;}__setup("driver_async_probe=", save_async_options);bool driver_allows_async_probing(struct device_driver *drv){ switch (drv->probe_type) { case PROBE_PREFER_ASYNCHRONOUS: return true; case PROBE_FORCE_SYNCHRONOUS: return false; default: if (cmdline_requested_async_probing(drv->name)) return true; if (module_requested_async_probing(drv->owner)) return true; return false; }}struct device_attach_data { struct device *dev;