[PATCH 15/23] usb: gadget: composite: handle get_alt() automatically

[Robert Baldyga]

As now we store current altsetting number for each interface, we can
handle USB_REQ_GET_INTERFACE automatically.

Signed-off-by: Robert Baldyga <r.baldyga@xxxxxxxxxxx>
---
 drivers/usb/gadget/composite.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 5ce95d2..21f8c51 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -2075,7 +2075,13 @@ composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
 		if (!f)
 			break;
 		/* lots of interfaces only need altsetting zero... */
-		value = f->get_alt ? f->get_alt(f, w_index) : 0;
+		if (usb_function_is_new_api(f)) {
+			value = usb_interface_id_to_index(f, intf);
+			if (value >= 0)
+				value = f->descs->intfs[value]->cur_altset;
+		} else {
+			value = f->get_alt ? f->get_alt(f, w_index) : 0;
+		}
 		if (value < 0)
 			break;
 		*((u8 *)req->buf) = value;
-- 
1.9.1

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