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@xxxxxxxxxxxxxxx> know about it.
>From 97e133d54c1ca8948b191e5721a145a76c4db33d Mon Sep 17 00:00:00 2001
From: Roger Quadros <rogerq@xxxxxx>
Date: Tue, 19 Sep 2017 11:46:16 +0300
Subject: usb: gadget: core: fix ->udc_set_speed() logic
From: Roger Quadros <rogerq@xxxxxx>
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@xxxxxx>
Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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@xxxxxx are
queue-4.13/usb-gadget-core-fix-udc_set_speed-logic.patch