[PATCH 3.19.y-ckt 027/160] usb: gadget: pxa27x: fix suspend callback

From: Kamal Mostafa
Date: Tue Jan 19 2016 - 20:35:05 EST

3.19.8-ckt13 -stable review patch. If anyone has any objections, please let me know.


From: Felipe Balbi <balbi@xxxxxx>

commit 391e6dcb37857d5659b53def2f41e2f56850d33c upstream.

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

Tested-by: Robert Jarzmik <robert.jarzmik@xxxxxxx>
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
drivers/usb/gadget/udc/pxa27x_udc.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/usb/gadget/udc/pxa27x_udc.c b/drivers/usb/gadget/udc/pxa27x_udc.c
index c61a896..376cf3b 100644
--- a/drivers/usb/gadget/udc/pxa27x_udc.c
+++ b/drivers/usb/gadget/udc/pxa27x_udc.c
@@ -2549,6 +2549,9 @@ 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;