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    Subject[PATCH 4.16 042/196] usb: dwc3: prevent setting PRTCAP to OTG from debugfs
    Date
    4.16-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Roger Quadros <rogerq@ti.com>

    commit daaecc6541d014dca073473ec8a4120c0babbeb4 upstream.

    We don't support PRTCAP == OTG yet, so prevent user from
    setting it via debugfs.

    Fixes: 41ce1456e1db ("usb: dwc3: core: make dwc3_set_mode() work properly")
    Cc: <stable@vger.kernel.org> # v4.12+
    Signed-off-by: Roger Quadros <rogerq@ti.com>
    Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/usb/dwc3/core.c | 3 +++
    1 file changed, 3 insertions(+)

    --- a/drivers/usb/dwc3/core.c
    +++ b/drivers/usb/dwc3/core.c
    @@ -119,6 +119,9 @@ static void __dwc3_set_mode(struct work_
    if (dwc->dr_mode != USB_DR_MODE_OTG)
    return;

    + if (dwc->desired_dr_role == DWC3_GCTL_PRTCAP_OTG)
    + return;
    +
    switch (dwc->current_dr_role) {
    case DWC3_GCTL_PRTCAP_HOST:
    dwc3_host_exit(dwc);

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