From: Bin Liu <b-liu@ti.com>
Date: Thu, 24 Aug 2017 16:38:34 +0000 (-0500)
Subject: usb: musb: print an error message when high bandwidth is unsupported
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1bff25eafa451c6210d6dfdff63e39c55c96a3e3;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

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>
---

diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index 605167d81676..b17450a59882 100644
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -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;
 		}