From: Felipe Balbi <balbi@ti.com>
Date: Wed, 18 Nov 2015 23:06:00 +0000 (-0600)
Subject: usb: gadget: pxa27x: fix suspend callback
X-Git-Tag: firefly_0821_release~176^2~570^2~2^2~14
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=391e6dcb37857d5659b53def2f41e2f56850d33c;p=firefly-linux-kernel-4.4.55.git

usb: gadget: pxa27x: fix suspend callback

pxa27x disconnects pullups on suspend but doesn't
notify the gadget driver about it, so gadget driver
can't disable the endpoints it was using.

This causes problems on resume because gadget core
will think endpoints are still enabled and just
ignore the following usb_ep_enable().

Fix this problem by calling
gadget_driver->disconnect().

Cc: <stable@vger.kernel.org> # v3.10+
Tested-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Felipe Balbi <balbi@ti.com>
---

diff --git a/drivers/usb/gadget/udc/pxa27x_udc.c b/drivers/usb/gadget/udc/pxa27x_udc.c
index 670ac0b12f00..001a3b74a993 100644
--- a/drivers/usb/gadget/udc/pxa27x_udc.c
+++ b/drivers/usb/gadget/udc/pxa27x_udc.c
@@ -2536,6 +2536,9 @@ static int pxa_udc_suspend(struct platform_device *_dev, pm_message_t state)
 	udc->pullup_resume = udc->pullup_on;
 	dplus_pullup(udc, 0);
 
+	if (udc->driver)
+		udc->driver->disconnect(&udc->gadget);
+
 	return 0;
 }