Commit 1bff25ea authored Aug 24, 2017 by Bin Liu Committed by Greg Kroah-Hartman Aug 28, 2017

usb: musb: print an error message when high bandwidth is unsupported



There are multiple places in usb core or controller driver which returns
-EMSGSIZE when a class driver queueing urb failed, so the "Message too
long" log doesn't help much for understanding the error.

Let the musb driver to specifically print a error message when
musb_urb_enqueue() returns -EMSGSIZE.

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent a2f65606

drivers/usb/musb/musb_host.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -2248,6 +2248,10 @@ static int musb_urb_enqueue(
		ok = (usb_pipein(urb->pipe) && musb->hb_iso_rx)
		\|\| (usb_pipeout(urb->pipe) && musb->hb_iso_tx);
		if (!ok) {
		dev_err(musb->controller,
		"high bandwidth %s (%dx%d) not supported\n",
		musb_ep_xfertype_string(qh->type),
		qh->hb_mult, qh->maxpacket & 0x7ff);
		ret = -EMSGSIZE;
		goto done;
		}