From patchwork Wed Sep 2 11:01:15 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 11750353 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 10A8B166C for ; Wed, 2 Sep 2020 11:05:16 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9BCA72078E for ; Wed, 2 Sep 2020 11:05:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alsa-project.org header.i=@alsa-project.org header.b="MT/pq9iN"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="2XE3WeRu" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9BCA72078E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=alsa-devel-bounces@alsa-project.org Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 2479616F7; Wed, 2 Sep 2020 13:04:30 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 2479616F7 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1599044714; bh=gjlI9Gga3bx1Zf/LGWOYJ4nihY5+cfkZy7nlCQlaazY=; h=From:To:Subject:Date:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=MT/pq9iNoThAAj8S86mUjGKZwSyBFzfc7opWCKTBYKxWqt8XEJEC7qWoSEzR1+Od+ u52AnaJnYciCsULRYF9WHMOZe8F1Lr7ol0L1r9zcye0FHlSFyXWy1A3gGBAgOqdhLP 744jmXhHxs8nHOGEylsB9YmPcA5Ui7G4cFK/MRHc= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id D839DF802F9; Wed, 2 Sep 2020 13:01:23 +0200 (CEST) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa1.perex.cz (Postfix, from userid 50401) id 3A26FF802DF; Wed, 2 Sep 2020 13:01:18 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on alsa1.perex.cz X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=disabled version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 5C01BF802C4 for ; Wed, 2 Sep 2020 13:01:11 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 5C01BF802C4 Authentication-Results: alsa1.perex.cz; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="2XE3WeRu" Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1A6792137B; Wed, 2 Sep 2020 11:01:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1599044469; bh=gjlI9Gga3bx1Zf/LGWOYJ4nihY5+cfkZy7nlCQlaazY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=2XE3WeRuxlNb6+ZPPAgtZXFp7dVh6G/BByCKuHQz2l8cpuv2S/8ruzkJmq3jnnP8M dZs8N8pEDMx5xKbZRkXlsHM17Hx0ONV/GzfFLcj2skOmQY5LyDNcedLKpquF984ESR FdnTGT2VZ/QXSgfFbdoqd2YHbcPKo1ACwoTBVicw= From: Greg Kroah-Hartman To: himadrispandya@gmail.com, dvyukov@google.com, linux-usb@vger.kernel.org Subject: [PATCH 10/10] Bluetooth: ath3k: use usb_control_msg_send() and usb_control_msg_recv() Date: Wed, 2 Sep 2020 13:01:15 +0200 Message-Id: <20200902110115.1994491-14-gregkh@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200902110115.1994491-1-gregkh@linuxfoundation.org> References: <20200902110115.1994491-1-gregkh@linuxfoundation.org> MIME-Version: 1.0 Cc: alsa-devel@alsa-project.org, johan.hedberg@gmail.com, Greg Kroah-Hartman , marcel@holtmann.org, linux-kernel@vger.kernel.org, tiwai@suse.com, stern@rowland.harvard.ed, linux-bluetooth@vger.kernel.org X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" The usb_control_msg_send() and usb_control_msg_recv() calls can return an error if a "short" write/read happens, and they can handle data off of the stack, so move the driver over to using those calls instead, saving some logic when dynamically allocating memory. Cc: Marcel Holtmann Cc: Johan Hedberg Cc: linux-bluetooth@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/bluetooth/ath3k.c | 90 +++++++++++---------------------------- 1 file changed, 26 insertions(+), 64 deletions(-) diff --git a/drivers/bluetooth/ath3k.c b/drivers/bluetooth/ath3k.c index 4ce270513695..1472cccfd0b3 100644 --- a/drivers/bluetooth/ath3k.c +++ b/drivers/bluetooth/ath3k.c @@ -212,19 +212,16 @@ static int ath3k_load_firmware(struct usb_device *udev, BT_DBG("udev %p", udev); - pipe = usb_sndctrlpipe(udev, 0); - send_buf = kmalloc(BULK_SIZE, GFP_KERNEL); if (!send_buf) { BT_ERR("Can't allocate memory chunk for firmware"); return -ENOMEM; } - memcpy(send_buf, firmware->data, FW_HDR_SIZE); - err = usb_control_msg(udev, pipe, USB_REQ_DFU_DNLOAD, USB_TYPE_VENDOR, - 0, 0, send_buf, FW_HDR_SIZE, - USB_CTRL_SET_TIMEOUT); - if (err < 0) { + err = usb_control_msg_send(udev, 0, USB_REQ_DFU_DNLOAD, USB_TYPE_VENDOR, + 0, 0, firmware->data, FW_HDR_SIZE, + USB_CTRL_SET_TIMEOUT); + if (err) { BT_ERR("Can't change to loading configuration err"); goto error; } @@ -259,44 +256,17 @@ static int ath3k_load_firmware(struct usb_device *udev, static int ath3k_get_state(struct usb_device *udev, unsigned char *state) { - int ret, pipe = 0; - char *buf; - - buf = kmalloc(sizeof(*buf), GFP_KERNEL); - if (!buf) - return -ENOMEM; - - pipe = usb_rcvctrlpipe(udev, 0); - ret = usb_control_msg(udev, pipe, ATH3K_GETSTATE, - USB_TYPE_VENDOR | USB_DIR_IN, 0, 0, - buf, sizeof(*buf), USB_CTRL_SET_TIMEOUT); - - *state = *buf; - kfree(buf); - - return ret; + return usb_control_msg_recv(udev, 0, ATH3K_GETSTATE, + USB_TYPE_VENDOR | USB_DIR_IN, 0, 0, + state, 1, USB_CTRL_SET_TIMEOUT); } static int ath3k_get_version(struct usb_device *udev, struct ath3k_version *version) { - int ret, pipe = 0; - struct ath3k_version *buf; - const int size = sizeof(*buf); - - buf = kmalloc(size, GFP_KERNEL); - if (!buf) - return -ENOMEM; - - pipe = usb_rcvctrlpipe(udev, 0); - ret = usb_control_msg(udev, pipe, ATH3K_GETVERSION, - USB_TYPE_VENDOR | USB_DIR_IN, 0, 0, - buf, size, USB_CTRL_SET_TIMEOUT); - - memcpy(version, buf, size); - kfree(buf); - - return ret; + return usb_control_msg_recv(udev, 0, ATH3K_GETVERSION, + USB_TYPE_VENDOR | USB_DIR_IN, 0, 0, + version, sizeof(*version), USB_CTRL_SET_TIMEOUT); } static int ath3k_load_fwfile(struct usb_device *udev, @@ -316,13 +286,10 @@ static int ath3k_load_fwfile(struct usb_device *udev, } size = min_t(uint, count, FW_HDR_SIZE); - memcpy(send_buf, firmware->data, size); - pipe = usb_sndctrlpipe(udev, 0); - ret = usb_control_msg(udev, pipe, ATH3K_DNLOAD, - USB_TYPE_VENDOR, 0, 0, send_buf, - size, USB_CTRL_SET_TIMEOUT); - if (ret < 0) { + ret = usb_control_msg_send(udev, 0, ATH3K_DNLOAD, USB_TYPE_VENDOR, 0, 0, + firmware->data, size, USB_CTRL_SET_TIMEOUT); + if (ret) { BT_ERR("Can't change to loading configuration err"); kfree(send_buf); return ret; @@ -355,23 +322,19 @@ static int ath3k_load_fwfile(struct usb_device *udev, return 0; } -static int ath3k_switch_pid(struct usb_device *udev) +static void ath3k_switch_pid(struct usb_device *udev) { - int pipe = 0; - - pipe = usb_sndctrlpipe(udev, 0); - return usb_control_msg(udev, pipe, USB_REG_SWITCH_VID_PID, - USB_TYPE_VENDOR, 0, 0, - NULL, 0, USB_CTRL_SET_TIMEOUT); + usb_control_msg_send(udev, 0, USB_REG_SWITCH_VID_PID, USB_TYPE_VENDOR, + 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT); } static int ath3k_set_normal_mode(struct usb_device *udev) { unsigned char fw_state; - int pipe = 0, ret; + int ret; ret = ath3k_get_state(udev, &fw_state); - if (ret < 0) { + if (ret) { BT_ERR("Can't get state to change to normal mode err"); return ret; } @@ -381,10 +344,9 @@ static int ath3k_set_normal_mode(struct usb_device *udev) return 0; } - pipe = usb_sndctrlpipe(udev, 0); - return usb_control_msg(udev, pipe, ATH3K_SET_NORMAL_MODE, - USB_TYPE_VENDOR, 0, 0, - NULL, 0, USB_CTRL_SET_TIMEOUT); + return usb_control_msg_send(udev, 0, ATH3K_SET_NORMAL_MODE, + USB_TYPE_VENDOR, 0, 0, NULL, 0, + USB_CTRL_SET_TIMEOUT); } static int ath3k_load_patch(struct usb_device *udev) @@ -397,7 +359,7 @@ static int ath3k_load_patch(struct usb_device *udev) int ret; ret = ath3k_get_state(udev, &fw_state); - if (ret < 0) { + if (ret) { BT_ERR("Can't get state to change to load ram patch err"); return ret; } @@ -408,7 +370,7 @@ static int ath3k_load_patch(struct usb_device *udev) } ret = ath3k_get_version(udev, &fw_version); - if (ret < 0) { + if (ret) { BT_ERR("Can't get version to change to load ram patch err"); return ret; } @@ -449,13 +411,13 @@ static int ath3k_load_syscfg(struct usb_device *udev) int clk_value, ret; ret = ath3k_get_state(udev, &fw_state); - if (ret < 0) { + if (ret) { BT_ERR("Can't get state to change to load configuration err"); return -EBUSY; } ret = ath3k_get_version(udev, &fw_version); - if (ret < 0) { + if (ret) { BT_ERR("Can't get version to change to load ram patch err"); return ret; } @@ -529,7 +491,7 @@ static int ath3k_probe(struct usb_interface *intf, return ret; } ret = ath3k_set_normal_mode(udev); - if (ret < 0) { + if (ret) { BT_ERR("Set normal mode failed"); return ret; }