USB: dbgp gadget: fix return value of dbgp_setup
Current code returns 0 even if it can't handle the request.
This leads to timeouts when an unhandled request is sent:
Bus 001 Device 003: ID 0525:c0de Netchip Technology, Inc.
Device Descriptor:
[..]
can't get device qualifier: Connection timed out
[..]
change the code to return EOPNOTSUPP in such cases.
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/gadget/dbgp.c b/drivers/usb/gadget/dbgp.c
index e5ac8a3..2932b48 100644
--- a/drivers/usb/gadget/dbgp.c
+++ b/drivers/usb/gadget/dbgp.c
@@ -350,9 +350,9 @@
u8 request = ctrl->bRequest;
u16 value = le16_to_cpu(ctrl->wValue);
u16 length = le16_to_cpu(ctrl->wLength);
- int err = 0;
- void *data;
- u16 len;
+ int err = -EOPNOTSUPP;
+ void *data = NULL;
+ u16 len = 0;
gadget->ep0->driver_data = gadget;
@@ -371,10 +371,9 @@
default:
goto fail;
}
+ err = 0;
} else if (request == USB_REQ_SET_FEATURE &&
value == USB_DEVICE_DEBUG_MODE) {
- len = 0;
- data = NULL;
dev_dbg(&dbgp.gadget->dev, "setup: feat debug\n");
#ifdef CONFIG_USB_G_DBGP_PRINTK
err = dbgp_enable_ep();