1 // SPDX-License-Identifier: GPL-2.0
19  * use small loading timeout for caching devices' firmware because all these
22  * current distributions is about 2M bytes, so 10 secs should be enough.
30 /* Restores the timeout to the value last configured during normal operation */
42 static inline int fw_sysfs_wait_timeout(struct fw_priv *fw_priv,  long timeout)  in fw_sysfs_wait_timeout()  argument
44 	return __fw_state_wait_common(fw_priv, timeout);  in fw_sysfs_wait_timeout()
57 		if (kill_all || !fw_priv->need_uevent)  in kill_pending_fw_fallback_reqs()
68  * fw_load_sysfs_fallback() - load a firmware via the sysfs fallback mechanism
70  * @timeout: timeout to wait for the load
74 static int fw_load_sysfs_fallback(struct fw_sysfs *fw_sysfs, long timeout)  in fw_load_sysfs_fallback()  argument
77 	struct device *f_dev = &fw_sysfs->dev;  in fw_load_sysfs_fallback()
78 	struct fw_priv *fw_priv = fw_sysfs->fw_priv;  in fw_load_sysfs_fallback()
81 	if (!fw_priv->data)  in fw_load_sysfs_fallback()
82 		fw_priv->is_paged_buf = true;  in fw_load_sysfs_fallback()
95 		retval = -EINTR;  in fw_load_sysfs_fallback()
98 	list_add(&fw_priv->pending_list, &pending_fw_head);  in fw_load_sysfs_fallback()
101 	if (fw_priv->opt_flags & FW_OPT_UEVENT) {  in fw_load_sysfs_fallback()
102 		fw_priv->need_uevent = true;  in fw_load_sysfs_fallback()
104 		dev_dbg(f_dev, "firmware: requesting %s\n", fw_priv->fw_name);  in fw_load_sysfs_fallback()
105 		kobject_uevent(&fw_sysfs->dev.kobj, KOBJ_ADD);  in fw_load_sysfs_fallback()
107 		timeout = MAX_JIFFY_OFFSET;  in fw_load_sysfs_fallback()
110 	retval = fw_sysfs_wait_timeout(fw_priv, timeout);  in fw_load_sysfs_fallback()
111 	if (retval < 0 && retval != -ENOENT) {  in fw_load_sysfs_fallback()
118 		if (retval == -ERESTARTSYS)  in fw_load_sysfs_fallback()
119 			retval = -EINTR;  in fw_load_sysfs_fallback()
120 	} else if (fw_priv->is_paged_buf && !fw_priv->data)  in fw_load_sysfs_fallback()
121 		retval = -ENOMEM;  in fw_load_sysfs_fallback()
135 	long timeout;  in fw_load_from_user_helper()  local
138 	timeout = firmware_loading_timeout();  in fw_load_from_user_helper()
140 		timeout = usermodehelper_read_lock_wait(timeout);  in fw_load_from_user_helper()
141 		if (!timeout) {  in fw_load_from_user_helper()
144 			return -EBUSY;  in fw_load_from_user_helper()
161 	fw_sysfs->fw_priv = firmware->priv;  in fw_load_from_user_helper()
162 	ret = fw_load_sysfs_fallback(fw_sysfs, timeout);  in fw_load_from_user_helper()
203  * firmware_fallback_sysfs() - use the fallback mechanism to find firmware