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 my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-linus branch.
The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)
The patch will hopefully also be merged in Linus's tree for the
next -rc kernel release.
If you have any questions about this process, please let me know.
>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
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")
Cc: <stable@xxxxxxxxxxxxxxx> [v4.13+]
Signed-off-by: Roger Quadros <rogerq@xxxxxx>
Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx>
---
drivers/usb/gadget/udc/core.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c
index 75c51ca4ee0f..d41d07aae0ce 100644
--- a/drivers/usb/gadget/udc/core.c
+++ b/drivers/usb/gadget/udc/core.c
@@ -1320,8 +1320,7 @@ static int udc_bind_to_driver(struct usb_udc *udc, struct usb_gadget_driver *dri
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)
--
2.14.1