--- zzzz-none-000/linux-5.4.213/drivers/usb/storage/scsiglue.c	2022-09-15 10:04:56.000000000 +0000
+++ alder-5690pro-762/linux-5.4.213/drivers/usb/storage/scsiglue.c	2024-08-14 09:02:08.000000000 +0000
@@ -588,8 +588,37 @@
 }
 static DEVICE_ATTR_RW(max_sectors);
 
+#if defined(CONFIG_AVM_USB_PM)
+/* Output routine for the sysfs max_spinup_ms file */
+static ssize_t max_spinup_ms_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct us_data *us = host_to_us(dev_to_shost(dev));
+
+	return sprintf(buf, "%u\n", us->max_spinup_ms);
+}
+
+/* Input routine for the sysfs max_sectors file */
+static ssize_t max_spinup_ms_store(struct device *dev, struct device_attribute *attr, const char *buf,
+		size_t count)
+{
+	struct us_data *us = host_to_us(dev_to_shost(dev));
+	unsigned int ms;
+
+	if (sscanf(buf, "%u", &ms) > 0) {
+		us->max_spinup_ms = ms;
+		return count;
+	}
+	return -EINVAL;
+}
+
+static DEVICE_ATTR_RW(max_spinup_ms);
+#endif
+
 static struct device_attribute *sysfs_device_attr_list[] = {
 	&dev_attr_max_sectors,
+#if defined(CONFIG_AVM_USB_PM)
+	&dev_attr_max_spinup_ms,
+#endif
 	NULL,
 };
 
@@ -644,7 +673,14 @@
 	 * and Apple Mac OS X 10.11 limiting transfers to 256 sectors for USB2
 	 * and 2048 for USB3 devices.
 	 */
+#if defined(CONFIG_AVM_ENHANCED)
+	/* == AVM/WKR 20230426 - transfer speed optimization for USB 2.0 devices == */
+	/* limit the total size of a transfer to 512 KB to reduce USB irqs */
+	.max_sectors =                  1024,
+#else
+	/* limit the total size of a transfer to 120 KB */
 	.max_sectors =                  240,
+#endif
 
 	/* emulated HBA */
 	.emulated =			1,