From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:50570 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752171AbdLJRHf (ORCPT ); Sun, 10 Dec 2017 12:07:35 -0500 Subject: Patch "usb: gadget: core: Fix ->udc_set_speed() speed handling" has been added to the 4.14-stable tree To: rogerq@ti.com, Dylan.Howey@tennantco.com, felipe.balbi@linux.intel.com, gregkh@linuxfoundation.org Cc: , From: Date: Sun, 10 Dec 2017 18:07:18 +0100 Message-ID: <1512925638132155@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled usb: gadget: core: Fix ->udc_set_speed() speed handling to the 4.14-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-speed-handling.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From a4f0927ef588cf62bb864707261482c874352942 Mon Sep 17 00:00:00 2001 From: Roger Quadros Date: Tue, 31 Oct 2017 15:56:29 +0200 Subject: usb: gadget: core: Fix ->udc_set_speed() speed handling From: Roger Quadros commit a4f0927ef588cf62bb864707261482c874352942 upstream. Currently UDC core calls ->udc_set_speed() with the speed parameter containing the maximum speed supported by the gadget function driver. This might very well be more than that supported by the UDC controller driver. Select the lesser of the 2 speeds so both UDC and gadget function driver are operating within limits. This fixes PHY Erratic errors and 2 second enumeration delay on TI's AM437x platforms. Fixes: 6099eca796ae ("usb: gadget: core: introduce ->udc_set_speed() method") Reported-by: Dylan Howey Signed-off-by: Roger Quadros Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/udc/core.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) --- a/drivers/usb/gadget/udc/core.c +++ b/drivers/usb/gadget/udc/core.c @@ -1080,8 +1080,12 @@ static inline void usb_gadget_udc_stop(s static inline void usb_gadget_udc_set_speed(struct usb_udc *udc, enum usb_device_speed speed) { - if (udc->gadget->ops->udc_set_speed) - udc->gadget->ops->udc_set_speed(udc->gadget, speed); + if (udc->gadget->ops->udc_set_speed) { + enum usb_device_speed s; + + s = min(speed, udc->gadget->max_speed); + udc->gadget->ops->udc_set_speed(udc->gadget, s); + } } /** Patches currently in stable-queue which might be from rogerq@ti.com are queue-4.14/usb-gadget-core-fix-udc_set_speed-speed-handling.patch