1 files changed, 19 insertions, 4 deletions

diff --git a/drivers/usb/gadget/function/f_uac2.c b/drivers/usb/gadget/function/f_uac2.c
index a5a27a504d67..33e16658e5cf 100644
--- a/drivers/usb/gadget/function/f_uac2.c
+++ b/drivers/usb/gadget/function/f_uac2.c
@@ -512,6 +512,11 @@ static int snd_uac2_remove(struct platform_device *pdev)
         return 0;
 }
 
+static void snd_uac2_release(struct device *dev)
+{
+        dev_dbg(dev, "releasing '%s'\n", dev_name(dev));
+}
+
 static int alsa_uac2_init(struct audio_dev *agdev)
 {
         struct snd_uac2_chip *uac2 = &agdev->uac2;
@@ -523,6 +528,7 @@ static int alsa_uac2_init(struct audio_dev *agdev)
 
         uac2->pdev.id = 0;
         uac2->pdev.name = uac2_name;
+        uac2->pdev.dev.release = snd_uac2_release;
 
         /* Register snd_uac2 driver */
         err = platform_driver_register(&uac2->pdrv);
@@ -772,6 +778,7 @@ struct usb_endpoint_descriptor fs_epout_desc = {
 
         .bEndpointAddress = USB_DIR_OUT,
         .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC,
+        .wMaxPacketSize = cpu_to_le16(1023),
         .bInterval = 1,
 };
 
@@ -780,6 +787,7 @@ struct usb_endpoint_descriptor hs_epout_desc = {
         .bDescriptorType = USB_DT_ENDPOINT,
 
         .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC,
+        .wMaxPacketSize = cpu_to_le16(1024),
         .bInterval = 4,
 };
 
@@ -847,6 +855,7 @@ struct usb_endpoint_descriptor fs_epin_desc = {
 
         .bEndpointAddress = USB_DIR_IN,
         .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC,
+        .wMaxPacketSize = cpu_to_le16(1023),
         .bInterval = 1,
 };
 
@@ -855,6 +864,7 @@ struct usb_endpoint_descriptor hs_epin_desc = {
         .bDescriptorType = USB_DT_ENDPOINT,
 
         .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC,
+        .wMaxPacketSize = cpu_to_le16(1024),
         .bInterval = 4,
 };
 
@@ -947,6 +957,9 @@ free_ep(struct uac2_rtd_params *prm, struct usb_ep *ep)
         struct snd_uac2_chip *uac2 = prm->uac2;
         int i;
 
+        if (!prm->ep_enabled)
+                return;
+
         prm->ep_enabled = false;
 
         for (i = 0; i < USB_XFERS; i++) {
@@ -1071,7 +1084,7 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
         prm->rbuf = kzalloc(prm->max_psize * USB_XFERS, GFP_KERNEL);
         if (!prm->rbuf) {
                 prm->max_psize = 0;
-                goto err;
+                goto err_free_descs;
         }
 
         prm = &agdev->uac2.p_prm;
@@ -1079,17 +1092,19 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
         prm->rbuf = kzalloc(prm->max_psize * USB_XFERS, GFP_KERNEL);
         if (!prm->rbuf) {
                 prm->max_psize = 0;
-                goto err;
+                goto err_free_descs;
         }
 
         ret = alsa_uac2_init(agdev);
         if (ret)
-                goto err;
+                goto err_free_descs;
         return 0;
+
+err_free_descs:
+        usb_free_all_descriptors(fn);
 err:
         kfree(agdev->uac2.p_prm.rbuf);
         kfree(agdev->uac2.c_prm.rbuf);
-        usb_free_all_descriptors(fn);
         if (agdev->in_ep)
                 agdev->in_ep->driver_data = NULL;
         if (agdev->out_ep)