Patch "usb: gadget: core: fix ->udc_set_speed() logic" has been added to the 4.13-stable tree

Patch "usb: gadget: core: fix ->udc_set_speed() logic" has been added to the 4.13-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    usb: gadget: core: fix ->udc_set_speed() logic

to the 4.13-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     usb-gadget-core-fix-udc_set_speed-logic.patch
and it can be found in the queue-4.13 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 97e133d54c1ca8948b191e5721a145a76c4db33d Mon Sep 17 00:00:00 2001
From: Roger Quadros <rogerq@ti.com>
Date: Tue, 19 Sep 2017 11:46:16 +0300
Subject: usb: gadget: core: fix ->udc_set_speed() logic

From: Roger Quadros <rogerq@ti.com>

commit 97e133d54c1ca8948b191e5721a145a76c4db33d upstream.

Consider the following case: udc controller supports SuperSpeed.  If we
first load a HighSpeed gadget followed by a SuperSpeed gadget, the
SuperSpeed gadget will be limited to HighSpeed as UDC core driver
doesn't call ->udc_set_speed() in the second case.

Call ->udc_set_speed() unconditionally to fix this issue.

This will also fix the case for dwc3 controller driver when SuperSpeed
gadget is loaded first and works in HighSpeed only as udc_set_speed()
was never being called.

Fixes: 6099eca796ae ("usb: gadget: core: introduce ->udc_set_speed() method")
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/usb/gadget/udc/core.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/usb/gadget/udc/core.c
+++ b/drivers/usb/gadget/udc/core.c
@@ -1314,8 +1314,7 @@ static int udc_bind_to_driver(struct usb
 	udc->dev.driver = &driver->driver;
 	udc->gadget->dev.driver = &driver->driver;
 
-	if (driver->max_speed < udc->gadget->max_speed)
-		usb_gadget_udc_set_speed(udc, driver->max_speed);
+	usb_gadget_udc_set_speed(udc, driver->max_speed);
 
 	ret = driver->bind(udc->gadget, driver);
 	if (ret)


Patches currently in stable-queue which might be from rogerq@ti.com are

queue-4.13/usb-gadget-core-fix-udc_set_speed-logic.patch