From patchwork Mon Mar 15 13:57:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 401373 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=ham 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 2B69AC4361A for ; Mon, 15 Mar 2021 14:03:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0548764EF8 for ; Mon, 15 Mar 2021 14:03:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233852AbhCOOCb (ORCPT ); Mon, 15 Mar 2021 10:02:31 -0400 Received: from mail.kernel.org ([198.145.29.99]:35186 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232941AbhCOOAM (ORCPT ); Mon, 15 Mar 2021 10:00:12 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id DA7F864F19; Mon, 15 Mar 2021 13:59:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1615816799; bh=I5/Ju2sqpmZF9GUUl8cG9iEELjgWoaYlwhzX40Zzz+w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DqmaPCmMak7fESJlSDQNLm1FMx5WFB1Y/EJ2//3N5vVEPI4vRkTT3SoOfsijrRB5A IZSE4zMDRIxOPtT0T0Sl26tNuTWxCQzu78AQzXN0tTOhKjL+6XFVVtGh7WyyHQEjvf F3s/zDBRkFHBHEKLrHcKUJy72IzxP/He6N1Ac5Hs= From: gregkh@linuxfoundation.org To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Yoshihiro Shimoda Subject: [PATCH 4.19 076/120] usb: renesas_usbhs: Clear PIPECFG for re-enabling pipe with other EPNUM Date: Mon, 15 Mar 2021 14:57:07 +0100 Message-Id: <20210315135722.462364689@linuxfoundation.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210315135720.002213995@linuxfoundation.org> References: <20210315135720.002213995@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@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); }