linux-kernel - [PATCH 4.19 080/346] USB: gadget: f_midi: setup SuperSpeed Plus descriptors

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Date:   Mon, 28 Dec 2020 13:46:39 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Felipe Balbi <balbi@...nel.org>,
        Will McVicker <willmcvicker@...gle.com>,
        Peter Chen <peter.chen@....com>
Subject: [PATCH 4.19 080/346] USB: gadget: f_midi: setup SuperSpeed Plus descriptors

From: Will McVicker <willmcvicker@...gle.com>

commit 457a902ba1a73b7720666b21ca038cd19764db18 upstream.

Needed for SuperSpeed Plus support for f_midi.  This allows the
gadget to work properly without crashing at SuperSpeed rates.

Cc: Felipe Balbi <balbi@...nel.org>
Cc: stable <stable@...r.kernel.org>
Signed-off-by: Will McVicker <willmcvicker@...gle.com>
Reviewed-by: Peter Chen <peter.chen@....com>
Link: https://lore.kernel.org/r/20201127140559.381351-4-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/usb/gadget/function/f_midi.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/usb/gadget/function/f_midi.c
+++ b/drivers/usb/gadget/function/f_midi.c
@@ -1048,6 +1048,12 @@ static int f_midi_bind(struct usb_config
 		f->ss_descriptors = usb_copy_descriptors(midi_function);
 		if (!f->ss_descriptors)
 			goto fail_f_midi;
+
+		if (gadget_is_superspeed_plus(c->cdev->gadget)) {
+			f->ssp_descriptors = usb_copy_descriptors(midi_function);
+			if (!f->ssp_descriptors)
+				goto fail_f_midi;
+		}
 	}
 
 	kfree(midi_function);