linux-4.4.1/_request_firmware() の変更点

• 追加された行はこの色です。
• 削除された行はこの色です。
• linux-4.4.1/_request_firmware() へ行く。
• linux-4.4.1/_request_firmware() の差分を削除

*参照元 [#k720e381]
#backlinks

*説明 [#s45835a0]
-パス: [[linux-4.4.1/drivers/base/firmware_class.c]]

-FIXME: これは何？
--説明


**引数 [#d0fcfe4f]
-const struct firmware **firmware_p
--
--[[linux-4.4.1/firmware]]
-const char *name
--
-struct device *device
--
--[[linux-4.4.1/device]]
-unsigned int opt_flags
--


**返り値 [#wef839c2]
-int
--


**参考 [#ce14f3c2]


*実装 [#y269b049]
 /* called from request_firmware() and request_firmware_work_func() */
 static int
 _request_firmware(const struct firmware **firmware_p, const char *name,
                   struct device *device, unsigned int opt_flags)
 {
         struct firmware *fw;
         long timeout;
         int ret;
 
-
--[[linux-4.4.1/firmware]]

         if (!firmware_p)
                 return -EINVAL;
 
         if (!name || name[0] == '\0')
                 return -EINVAL;
 
         ret = _request_firmware_prepare(&fw, name, device);
         if (ret <= 0) /* error or already assigned */
                 goto out;
 
-
--[[linux-4.4.1/_request_firmware_prepare()]]

         ret = 0;
         timeout = firmware_loading_timeout();
-
--[[linux-4.4.1/firmware_loading_timeout()]]

         if (opt_flags & FW_OPT_NOWAIT) {
                 timeout = usermodehelper_read_lock_wait(timeout);
                 if (!timeout) {
                         dev_dbg(device, "firmware: %s loading timed out\n",
                                 name);
                         ret = -EBUSY;
                         goto out;
                 }
-
--[[linux-4.4.1/usermodehelper_read_lock_wait()]]
--[[linux-4.4.1/dev_dbg()]]

         } else {
                 ret = usermodehelper_read_trylock();
                 if (WARN_ON(ret)) {
                         dev_err(device, "firmware: %s will not be loaded\n",
                                 name);
                         goto out;
                 }
-
--[[linux-4.4.1/usermodehelper_read_trylock()]]
--[[linux-4.4.1/WARN_ON()]]
--[[linux-4.4.1/dev_err()]]

         }
 
         ret = fw_get_filesystem_firmware(device, fw->priv);
         if (ret) {
                 if (!(opt_flags & FW_OPT_NO_WARN))
                         dev_warn(device,
                                  "Direct firmware load for %s failed with error %d\n",
                                  name, ret);
                 if (opt_flags & FW_OPT_USERHELPER) {
                         dev_warn(device, "Falling back to user helper\n");
                         ret = fw_load_from_user_helper(fw, name, device,
                                                        opt_flags, timeout);
                 }
         }
 
-
--[[linux-4.4.1/fw_get_filesystem_firmware()]]
--[[linux-4.4.1/dev_warn()]]
--[[linux-4.4.1/fw_load_from_user_helper()]]

         if (!ret)
                 ret = assign_firmware_buf(fw, device, opt_flags);
 
         usermodehelper_read_unlock();
 
-
--[[linux-4.4.1/assign_firmware_buf()]]
--[[linux-4.4.1/usermodehelper_read_unlock()]]

  out:
         if (ret < 0) {
                 release_firmware(fw);
                 fw = NULL;
         }
 
-
--[[linux-4.4.1/release_firmware()]]

         *firmware_p = fw;
         return ret;
 }


*コメント [#g7328a08]