From mboxrd@z Thu Jan 1 00:00:00 1970 From: Oliver Neukum Subject: Re: [PATCH] BugFix in XHCI controller driver for scatter gather DMA Date: Mon, 21 Dec 2015 13:50:24 +0100 Message-ID: <1450702224.17967.18.camel@suse.de> References: <1450699494-4598-1-git-send-email-vikas.bansal@samsung.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, sumit.batra@samsung.com To: Vikas Bansal Return-path: In-Reply-To: <1450699494-4598-1-git-send-email-vikas.bansal@samsung.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On Mon, 2015-12-21 at 17:34 +0530, Vikas Bansal wrote: > Pre-Condition > At the time of reset resume of a USB device, both self and bus powered devices might go to a low power state or power off state depending on the acceptable suspend time power of the system. > In case the device experiences a power glitch or completely powers off during suspend-resume, the device will lose its internal state and hence it'll again need a set interface from class driver on reset resume operation. > > Issue > So far our experiments were based on a USB gadget working on cdc_eem protocol. > We have seen that device is unable to continue the packet transfer on bulk endpoints after the reset resume operation. > > Solution > We have added a .reset_resume function for cdc_eem protocol which sends a set interface command on the Control endpoint. And calls the existing usbnet_resume thereafte Hi, something is wrong with your subject line. Could you fix that and resend? Regards Oliver