4.14-stable review patch. If anyone has any objections, please let me know.
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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 @@ -128,6 +128,9 @@ 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);