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

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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>
This commit is contained in:
Bin Liu 2017-08-24 11:38:34 -05:00 • committed by Greg Kroah-Hartman
parent a2f656060b
commit 1bff25eafa
1 changed files with 4 additions and 0 deletions
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4
drivers/usb/musb/musb_host.c
View file

@ -2248,6 +2248,10 @@ static int musb_urb_enqueue(
ok = (usb_pipein(urb->pipe) && musb->hb_iso_rx) ok = (usb_pipein(urb->pipe) && musb->hb_iso_rx)
|| (usb_pipeout(urb->pipe) && musb->hb_iso_tx); || (usb_pipeout(urb->pipe) && musb->hb_iso_tx);
if (!ok) { 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; ret = -EMSGSIZE;
goto done; goto done;
} }