From daaecc6541d014dca073473ec8a4120c0babbeb4 Mon Sep 17 00:00:00 2001
From: Roger Quadros <rogerq@ti.com>
Date: Tue, 27 Feb 2018 12:54:37 +0200
Subject: [PATCH] usb: dwc3: prevent setting PRTCAP to OTG from debugfs
Git-commit: daaecc6541d014dca073473ec8a4120c0babbeb4
Patch-mainline: v4.17-rc1
References: bsc#1051510
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>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/usb/dwc3/core.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index f1d838a4acd6..b014c87a7319 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -119,6 +119,9 @@ static void __dwc3_set_mode(struct work_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);
--
2.18.0