cdc_ecm: Update max supported transfer size after reset

RIOT-OS · Mar 31, 2023 · b342f76 · b342f76
1 parent adaee35
commit b342f76
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Showing 2 changed files with 7 additions and 1 deletion.
diff --git a/sys/usb/usbus/cdc/ecm/cdc_ecm.c b/sys/usb/usbus/cdc/ecm/cdc_ecm.c
@@ -336,6 +336,12 @@ static void _handle_reset(usbus_t *usbus, usbus_handler_t *handler)
 {
     usbus_cdcecm_device_t *cdcecm = (usbus_cdcecm_device_t *)handler;
 
+    /* Set the max packet size advertised to the host to something compatible with the enumerated
+     * size */
+    size_t maxpacketsize = usbus_max_bulk_endpoint_size(usbus);
+    cdcecm->ep_in->maxpacketsize = maxpacketsize;
+    cdcecm->ep_out->maxpacketsize = maxpacketsize;
+
     DEBUG("CDC ECM: Reset\n");
     _handle_in_complete(usbus, handler);
     cdcecm->notif = USBUS_CDCECM_NOTIF_NONE;

diff --git a/sys/usb/usbus/cdc/ecm/cdc_ecm_netdev.c b/sys/usb/usbus/cdc/ecm/cdc_ecm_netdev.c
@@ -71,7 +71,7 @@ static int _send(netdev_t *netdev, const iolist_t *iolist)
     /* load packet data into FIFO */
     size_t iol_offset = 0;
     size_t usb_offset = 0;
-    size_t usb_remain = cdcecm->ep_in->ep->len;
+    size_t usb_remain = cdcecm->ep_in->maxpacketsize;
     DEBUG("CDC_ECM_netdev: cur iol: %d\n", iolist->iol_len);
     while (len) {
         mutex_lock(&cdcecm->out_lock);