From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-3704313-1519414856-2-10335839484497946816 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.001, ME_NOAUTH 0.01, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='CN', FromHeader='org', MailFrom='org' X-Spam-charsets: plain='UTF-8' X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: stable-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1519414856; b=o6jwpmR8B42dedtlWS36KGnw6Gj3PATGTusPBCAdYHlePzT nl4pLloMzbLlMlvZi7u8sJ/bXk9dDA+j6i1ZanX20IXInKIvytxHhupEIlovaBjq 17QCmyttM6TAx6sy2edYE/7AQbH7Yk4uSZ8mn6eA1xrUk6VKuhE37xqUedLuVxNX HbQS6d8BVvlHmKSzkP6Sx/9NGTIxMn3p/qNGq9eCKBcVw3Xo6PbIHeMjbZBUETPo gGS+pLSBO+nXHNsfoTFKqnZxOqFFs99nIiCxyuE/pa2YP8zFUz8fgMPXgV1jz3Fm p5o847I62kp30vILAvaBbfw4CkgC4g/LVILCZFQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-type:sender :list-id; s=arctest; t=1519414856; bh=rhwt239xBTQppNtvCDWml0TkhZ AhVRCIfQW2br4lxxg=; b=rr95ssP1ngY/Uaeyy6t3lDh0ErOST9VrB1xDEbUUPK 9BpiH7QKPFtCsOUzN1LY+XyQcHZNMNqidfEzr88ydY9qegV483lzvN0PqRQq3kKj yK8Uc4SBzU9H5x4F+7PVWKyfpjSCi00Ql7gf9LZPo2Hnw25gogn+uWDEtB2NRPxE w0sjX5uJiD6yJmIjNhd700Huw8/Or4ETjuHW1d/zBUmis3wimYPZGE37cFX32WI0 oNPOg6UE5ZZmAmoEhGWiTblqtegYs9DAZBPkfYYOnrdkwcKDrAxPfq8S7vxsdH/E aOPLxIRPv7ei3Ethzla2rfS7seMl2GOMvZTh5yM5Q2zg== ARC-Authentication-Results: i=1; mx4.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=linuxfoundation.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linuxfoundation.org header.result=pass header_is_org_domain=yes Authentication-Results: mx4.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=linuxfoundation.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linuxfoundation.org header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933596AbeBWTkk (ORCPT ); Fri, 23 Feb 2018 14:40:40 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:45244 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934513AbeBWStV (ORCPT ); Fri, 23 Feb 2018 13:49:21 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Andrey Konovalov , Takashi Iwai Subject: [PATCH 4.14 001/159] usb: core: Add a helper function to check the validity of EP type in URB Date: Fri, 23 Feb 2018 19:25:09 +0100 Message-Id: <20180223170743.256398104@linuxfoundation.org> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180223170743.086611315@linuxfoundation.org> References: <20180223170743.086611315@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Takashi Iwai commit e901b9873876ca30a09253731bd3a6b00c44b5b0 upstream. This patch adds a new helper function to perform a sanity check of the given URB to see whether it contains a valid endpoint. It's a light- weight version of what usb_submit_urb() does, but without the kernel warning followed by the stack trace, just returns an error code. Especially for a driver that doesn't parse the descriptor but fills the URB with the fixed endpoint (e.g. some quirks for non-compliant devices), this kind of check is preferable at the probe phase before actually submitting the urb. Tested-by: Andrey Konovalov Acked-by: Greg Kroah-Hartman Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/urb.c | 30 ++++++++++++++++++++++++++---- include/linux/usb.h | 2 ++ 2 files changed, 28 insertions(+), 4 deletions(-) --- a/drivers/usb/core/urb.c +++ b/drivers/usb/core/urb.c @@ -187,6 +187,31 @@ EXPORT_SYMBOL_GPL(usb_unanchor_urb); /*-------------------------------------------------------------------*/ +static const int pipetypes[4] = { + PIPE_CONTROL, PIPE_ISOCHRONOUS, PIPE_BULK, PIPE_INTERRUPT +}; + +/** + * usb_urb_ep_type_check - sanity check of endpoint in the given urb + * @urb: urb to be checked + * + * This performs a light-weight sanity check for the endpoint in the + * given urb. It returns 0 if the urb contains a valid endpoint, otherwise + * a negative error code. + */ +int usb_urb_ep_type_check(const struct urb *urb) +{ + const struct usb_host_endpoint *ep; + + ep = usb_pipe_endpoint(urb->dev, urb->pipe); + if (!ep) + return -EINVAL; + if (usb_pipetype(urb->pipe) != pipetypes[usb_endpoint_type(&ep->desc)]) + return -EINVAL; + return 0; +} +EXPORT_SYMBOL_GPL(usb_urb_ep_type_check); + /** * usb_submit_urb - issue an asynchronous transfer request for an endpoint * @urb: pointer to the urb describing the request @@ -326,9 +351,6 @@ EXPORT_SYMBOL_GPL(usb_unanchor_urb); */ int usb_submit_urb(struct urb *urb, gfp_t mem_flags) { - static int pipetypes[4] = { - PIPE_CONTROL, PIPE_ISOCHRONOUS, PIPE_BULK, PIPE_INTERRUPT - }; int xfertype, max; struct usb_device *dev; struct usb_host_endpoint *ep; @@ -444,7 +466,7 @@ int usb_submit_urb(struct urb *urb, gfp_ */ /* Check that the pipe's type matches the endpoint's type */ - if (usb_pipetype(urb->pipe) != pipetypes[xfertype]) + if (usb_urb_ep_type_check(urb)) dev_WARN(&dev->dev, "BOGUS urb xfer, pipe %x != type %x\n", usb_pipetype(urb->pipe), pipetypes[xfertype]); --- a/include/linux/usb.h +++ b/include/linux/usb.h @@ -1729,6 +1729,8 @@ static inline int usb_urb_dir_out(struct return (urb->transfer_flags & URB_DIR_MASK) == URB_DIR_OUT; } +int usb_urb_ep_type_check(const struct urb *urb); + void *usb_alloc_coherent(struct usb_device *dev, size_t size, gfp_t mem_flags, dma_addr_t *dma); void usb_free_coherent(struct usb_device *dev, size_t size,