From 1b68a4ca2d038addb7314211d122fb6d7002b38b Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Date: Sun, 19 Aug 2012 21:54:58 +0200
Subject: usb: gadget: dummy_hcd: fixup error probe path

If USB2 host controller probes fine but USB3 does not then we don't
remove the USB controller properly and lock up the system while the HUB
code will try to enumerate the USB2 controller and access memory which
is no longer available in case the dummy_hcd was compiled as a module.

This is a problem since 448b6eb1 ("USB: Make sure to fetch the BOS desc
for roothubs.) if used in USB3 mode because dummy does not provide this
descriptor and explodes later.

Cc: stable@vger.kernel.org # v3.5
Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Signed-off-by: Felipe Balbi <balbi@ti.com>
---
 drivers/usb/gadget/dummy_hcd.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'drivers/usb/gadget')

diff --git a/drivers/usb/gadget/dummy_hcd.c b/drivers/usb/gadget/dummy_hcd.c
index b799106027a..0e58a46956a 100644
--- a/drivers/usb/gadget/dummy_hcd.c
+++ b/drivers/usb/gadget/dummy_hcd.c
@@ -2503,10 +2503,8 @@ static int dummy_hcd_probe(struct platform_device *pdev)
 	hs_hcd->has_tt = 1;
 
 	retval = usb_add_hcd(hs_hcd, 0, 0);
-	if (retval != 0) {
-		usb_put_hcd(hs_hcd);
-		return retval;
-	}
+	if (retval)
+		goto put_usb2_hcd;
 
 	if (mod_data.is_super_speed) {
 		ss_hcd = usb_create_shared_hcd(&dummy_hcd, &pdev->dev,
@@ -2525,6 +2523,8 @@ static int dummy_hcd_probe(struct platform_device *pdev)
 put_usb3_hcd:
 	usb_put_hcd(ss_hcd);
 dealloc_usb2_hcd:
+	usb_remove_hcd(hs_hcd);
+put_usb2_hcd:
 	usb_put_hcd(hs_hcd);
 	the_controller.hs_hcd = the_controller.ss_hcd = NULL;
 	return retval;
-- 
cgit v1.2.3-70-g09d2