Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755319AbaDNR6Y (ORCPT ); Mon, 14 Apr 2014 13:58:24 -0400 Received: from iolanthe.rowland.org ([192.131.102.54]:42817 "HELO iolanthe.rowland.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1754311AbaDNR6W (ORCPT ); Mon, 14 Apr 2014 13:58:22 -0400 Date: Mon, 14 Apr 2014 13:58:20 -0400 (EDT) From: Alan Stern X-X-Sender: stern@iolanthe.rowland.org To: Stefani Seibold cc: linux-usb , , Greg KH , , Subject: Re: Missing USB XHCI and EHCI reset for kexec In-Reply-To: <1397493335.1028.4.camel@vger.seibold.net> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 14 Apr 2014, Stefani Seibold wrote: > > > An other PowerPC device which is nearly eactly the same HW but without > > > this USB HUB works perfectly. > > > > Maybe you should replace that hub with a different brand. > > > > Thats not possible, because the Hub is soldered on the board. And it is > also not a HW issue, since the Hub works perfectly which all previous > kernels including 3.4. One other thing you can try is to increase the reset timeout in drivers/usb/host/ehci-hub.c. This is under the USB_PORT_FEAT_RESET case in ehci_hub_control(), around line 1225: /* * caller must wait, then call GetPortStatus * usb 2.0 spec says 50 ms resets on root */ ehci->reset_done [wIndex] = jiffies + msecs_to_jiffies (50); Increasing the 50 to 100 or more might help. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/