From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0321AC2BA19 for ; Mon, 15 Mar 2021 14:24:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CC1FB64F02 for ; Mon, 15 Mar 2021 14:24:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238444AbhCOOXO (ORCPT ); Mon, 15 Mar 2021 10:23:14 -0400 Received: from mail.kernel.org ([198.145.29.99]:37500 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232887AbhCOOAF (ORCPT ); Mon, 15 Mar 2021 10:00:05 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 54A4164F69; Mon, 15 Mar 2021 13:59:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1615816788; bh=I5/Ju2sqpmZF9GUUl8cG9iEELjgWoaYlwhzX40Zzz+w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=xmHgCTdvvEXa509HzwRzsKcpsliJh6Mz9R8ltjy9IAjXdSphkhfYw25B7+sY5rTWk pxWDL0Rcqf5AGK49eR3FiSeVJGeL410+tUvSLdBYSOt04aXZYGbHWNoS8b2L9ZwUZ2 AzFF0uydqQxpKnfQvmJNIp69U/8iENmKlQPF14WE= From: gregkh@linuxfoundation.org To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Yoshihiro Shimoda Subject: [PATCH 5.4 110/168] usb: renesas_usbhs: Clear PIPECFG for re-enabling pipe with other EPNUM Date: Mon, 15 Mar 2021 14:55:42 +0100 Message-Id: <20210315135553.976127888@linuxfoundation.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210315135550.333963635@linuxfoundation.org> References: <20210315135550.333963635@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Greg Kroah-Hartman From: Yoshihiro Shimoda commit b1d25e6ee57c2605845595b6c61340d734253eb3 upstream. According to the datasheet, this controller has a restriction which "set an endpoint number so that combinations of the DIR bit and the EPNUM bits do not overlap.". However, since the udc core driver is possible to assign a bulk pipe as an interrupt endpoint, an endpoint number may not match the pipe number. After that, when user rebinds another gadget driver, this driver broke the restriction because the driver didn't clear any configuration in usb_ep_disable(). Example: # modprobe g_ncm Then, EP3 = pipe 3, EP4 = pipe 4, EP5 = pipe 6 # rmmod g_ncm # modprobe g_hid Then, EP3 = pipe 6, EP4 = pipe 7. So, pipe 3 and pipe 6 are set as EP3. So, clear PIPECFG register in usbhs_pipe_free(). Fixes: dfb87b8bfe09 ("usb: renesas_usbhs: gadget: fix re-enabling pipe without re-connecting") Cc: stable Signed-off-by: Yoshihiro Shimoda Link: https://lore.kernel.org/r/1615168538-26101-1-git-send-email-yoshihiro.shimoda.uh@renesas.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/renesas_usbhs/pipe.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/usb/renesas_usbhs/pipe.c +++ b/drivers/usb/renesas_usbhs/pipe.c @@ -746,6 +746,8 @@ struct usbhs_pipe *usbhs_pipe_malloc(str void usbhs_pipe_free(struct usbhs_pipe *pipe) { + usbhsp_pipe_select(pipe); + usbhsp_pipe_cfg_set(pipe, 0xFFFF, 0); usbhsp_put_pipe(pipe); }