--- zzzz-none-000/linux-4.4.271/drivers/usb/storage/usb.c	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/drivers/usb/storage/usb.c	2023-04-19 10:22:30.000000000 +0000
@@ -83,7 +83,13 @@
 MODULE_DESCRIPTION("USB Mass Storage driver for Linux");
 MODULE_LICENSE("GPL");
 
+/* == 20160222 AVM/VGJ need delay for UMTS modeswitch ==*/
+#if defined (CONFIG_USB_SERIAL_OPTION) || defined (CONFIG_USB_SERIAL_OPTION_MODULE)
+static unsigned int delay_use = 5;
+#else
 static unsigned int delay_use = 1;
+#endif
+
 module_param(delay_use, uint, S_IRUGO | S_IWUSR);
 MODULE_PARM_DESC(delay_use, "seconds to delay before using a new device");
 
@@ -1053,6 +1059,10 @@
 
 	/* Submit the delayed_work for SCSI-device scanning */
 	usb_autopm_get_interface_no_resume(us->pusb_intf);
+#ifdef CONFIG_AVM_USB_PM
+	/* == 20170929 AVM/VGJ - the scsi child must be ignored for the device to suspend ==*/
+	pm_suspend_ignore_children(&us->pusb_intf->dev, true);
+#endif
 	set_bit(US_FLIDX_SCAN_PENDING, &us->dflags);
 
 	if (delay_use > 0)