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path: root/drivers/usb/gadget/legacy/acm_ms.c
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Diffstat (limited to 'drivers/usb/gadget/legacy/acm_ms.c')
-rw-r--r--drivers/usb/gadget/legacy/acm_ms.c41
1 files changed, 19 insertions, 22 deletions
diff --git a/drivers/usb/gadget/legacy/acm_ms.c b/drivers/usb/gadget/legacy/acm_ms.c
index 1194b09ae746..4b158e2d1e57 100644
--- a/drivers/usb/gadget/legacy/acm_ms.c
+++ b/drivers/usb/gadget/legacy/acm_ms.c
@@ -58,21 +58,7 @@ static struct usb_device_descriptor device_desc = {
/*.bNumConfigurations = DYNAMIC*/
};
-static struct usb_otg_descriptor otg_descriptor = {
- .bLength = sizeof otg_descriptor,
- .bDescriptorType = USB_DT_OTG,
-
- /*
- * REVISIT SRP-only hardware is possible, although
- * it would not be called "OTG" ...
- */
- .bmAttributes = USB_OTG_SRP | USB_OTG_HNP,
-};
-
-static const struct usb_descriptor_header *otg_desc[] = {
- (struct usb_descriptor_header *) &otg_descriptor,
- NULL,
-};
+static const struct usb_descriptor_header *otg_desc[2];
/* string IDs are assigned dynamically */
static struct usb_string strings_dev[] = {
@@ -200,10 +186,6 @@ static int acm_ms_bind(struct usb_composite_dev *cdev)
if (status)
goto fail;
- status = fsg_common_set_nluns(opts->common, config.nluns);
- if (status)
- goto fail_set_nluns;
-
status = fsg_common_set_cdev(opts->common, cdev, config.can_stall);
if (status)
goto fail_set_cdev;
@@ -225,10 +207,21 @@ static int acm_ms_bind(struct usb_composite_dev *cdev)
device_desc.iManufacturer = strings_dev[USB_GADGET_MANUFACTURER_IDX].id;
device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;
+ if (gadget_is_otg(gadget) && !otg_desc[0]) {
+ struct usb_descriptor_header *usb_desc;
+
+ usb_desc = usb_otg_descriptor_alloc(gadget);
+ if (!usb_desc)
+ goto fail_string_ids;
+ usb_otg_descriptor_init(gadget, usb_desc);
+ otg_desc[0] = usb_desc;
+ otg_desc[1] = NULL;
+ }
+
/* register our configuration */
status = usb_add_config(cdev, &acm_ms_config_driver, acm_ms_do_config);
if (status < 0)
- goto fail_string_ids;
+ goto fail_otg_desc;
usb_composite_overwrite_options(cdev, &coverwrite);
dev_info(&gadget->dev, "%s, version: " DRIVER_VERSION "\n",
@@ -236,11 +229,12 @@ static int acm_ms_bind(struct usb_composite_dev *cdev)
return 0;
/* error recovery */
+fail_otg_desc:
+ kfree(otg_desc[0]);
+ otg_desc[0] = NULL;
fail_string_ids:
fsg_common_remove_luns(opts->common);
fail_set_cdev:
- fsg_common_free_luns(opts->common);
-fail_set_nluns:
fsg_common_free_buffers(opts->common);
fail:
usb_put_function_instance(fi_msg);
@@ -255,6 +249,9 @@ static int acm_ms_unbind(struct usb_composite_dev *cdev)
usb_put_function_instance(fi_msg);
usb_put_function(f_acm);
usb_put_function_instance(f_acm_inst);
+ kfree(otg_desc[0]);
+ otg_desc[0] = NULL;
+
return 0;
}