From: Jiebing Li <jiebing.li@intel.com>
Date: Thu, 11 Dec 2014 05:26:29 +0000 (+0800)
Subject: usb: dwc3: gadget: release spin lock during gadget resume
X-Git-Tag: v4.6-rc3~9^2~7^2~5
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=ad14d4e0308afda06a60036020a15025571604af;p=linux.git

usb: dwc3: gadget: release spin lock during gadget resume

It's a requirement that we release controller's lock
while calling gadget API function pointers. This
patch just fixes that long standing bug.

Signed-off-by: Jiebing Li <jiebing.li@intel.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
---

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 3ac170f9d94d..3d2c53e4ac92 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2487,7 +2487,11 @@ static void dwc3_gadget_wakeup_interrupt(struct dwc3 *dwc)
 	 * implemented.
 	 */
 
-	dwc->gadget_driver->resume(&dwc->gadget);
+	if (dwc->gadget_driver && dwc->gadget_driver->resume) {
+		spin_unlock(&dwc->lock);
+		dwc->gadget_driver->resume(&dwc->gadget);
+		spin_lock(&dwc->lock);
+	}
 }
 
 static void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc,