From patchwork Wed Sep 23 13:43:46 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oliver Neukum X-Patchwork-Id: 11795073 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 3D5EF6CA for ; Wed, 23 Sep 2020 13:44:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1BB42221EB for ; Wed, 23 Sep 2020 13:44:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=suse.com header.i=@suse.com header.b="esDU2k41" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726516AbgIWNoZ (ORCPT ); Wed, 23 Sep 2020 09:44:25 -0400 Received: from mx2.suse.de ([195.135.220.15]:33520 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726648AbgIWNoV (ORCPT ); Wed, 23 Sep 2020 09:44:21 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1600868658; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:in-reply-to:in-reply-to:references:references; bh=A0SLqdQOgt7r1yxVF4MnON32ZU4vIOB9jRiWgTSt+L4=; b=esDU2k41bvxKjjzDDZsqXmy+Riu2rJ0TkOfRRs7gS1p0iNuJr5Nbchp164DX9Gfx3DxKCq K3R8d3qMGXd9ElYelsoSuvPbkN/TqLRlb/7+RSLlGAjIiRKQmrRD0tB8YAXNDvztl7yVIg VBLzUzoAdwFmYRE/j/YR2rJk2FzOOCw= Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 7C833AD2C; Wed, 23 Sep 2020 13:44:55 +0000 (UTC) From: Oliver Neukum To: himadrispandya@gmail.com, gregKH@linuxfoundation.org, stern@rowland.harvard.edu, linux-usb@vger.kernel.org Cc: Greg Kroah-Hartman , Jaroslav Kysela , Vasily Khoruzhick Subject: [RFC 12/14] sound: line6: move to use usb_control_msg_send() and usb_control_msg_recv() Date: Wed, 23 Sep 2020 15:43:46 +0200 Message-Id: <20200923134348.23862-13-oneukum@suse.com> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20200923134348.23862-1-oneukum@suse.com> References: <20200923134348.23862-1-oneukum@suse.com> Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: Greg Kroah-Hartman 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. v2: API change of use usb_control_msg_send() and usb_control_msg_recv() Cc: Jaroslav Kysela Cc: Vasily Khoruzhick Reviewed-by: Takashi Iwai Link: https://lore.kernel.org/r/20200914153756.3412156-9-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman --- sound/usb/line6/driver.c | 72 +++++++++++++++++++--------------------------- sound/usb/line6/podhd.c | 23 ++++++--------- sound/usb/line6/toneport.c | 9 +++--- 3 files changed, 44 insertions(+), 60 deletions(-) diff --git a/sound/usb/line6/driver.c b/sound/usb/line6/driver.c index 60674ce4879b..a030dd65eb28 100644 --- a/sound/usb/line6/driver.c +++ b/sound/usb/line6/driver.c @@ -337,23 +337,18 @@ int line6_read_data(struct usb_line6 *line6, unsigned address, void *data, { struct usb_device *usbdev = line6->usbdev; int ret; - unsigned char *len; + u8 len; unsigned count; if (address > 0xffff || datalen > 0xff) return -EINVAL; - len = kmalloc(1, GFP_KERNEL); - if (!len) - return -ENOMEM; - /* query the serial number: */ - ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), 0x67, - USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT, - (datalen << 8) | 0x21, address, - NULL, 0, LINE6_TIMEOUT * HZ); - - if (ret < 0) { + ret = usb_control_msg_send(usbdev, 0, 0x67, + USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT, + (datalen << 8) | 0x21, address, NULL, 0, + LINE6_TIMEOUT * HZ, GFP_KERNEL); + if (ret) { dev_err(line6->ifcdev, "read request failed (error %d)\n", ret); goto exit; } @@ -362,45 +357,42 @@ int line6_read_data(struct usb_line6 *line6, unsigned address, void *data, for (count = 0; count < LINE6_READ_WRITE_MAX_RETRIES; count++) { mdelay(LINE6_READ_WRITE_STATUS_DELAY); - ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 0x67, - USB_TYPE_VENDOR | USB_RECIP_DEVICE | - USB_DIR_IN, - 0x0012, 0x0000, len, 1, - LINE6_TIMEOUT * HZ); - if (ret < 0) { + ret = usb_control_msg_recv(usbdev, 0, 0x67, + USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN, + 0x0012, 0x0000, &len, 1, + LINE6_TIMEOUT * HZ, GFP_KERNEL); + if (ret) { dev_err(line6->ifcdev, "receive length failed (error %d)\n", ret); goto exit; } - if (*len != 0xff) + if (len != 0xff) break; } ret = -EIO; - if (*len == 0xff) { + if (len == 0xff) { dev_err(line6->ifcdev, "read failed after %d retries\n", count); goto exit; - } else if (*len != datalen) { + } else if (len != datalen) { /* should be equal or something went wrong */ dev_err(line6->ifcdev, "length mismatch (expected %d, got %d)\n", - (int)datalen, (int)*len); + (int)datalen, len); goto exit; } /* receive the result: */ - ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 0x67, - USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN, - 0x0013, 0x0000, data, datalen, - LINE6_TIMEOUT * HZ); - - if (ret < 0) + ret = usb_control_msg_recv(usbdev, 0, 0x67, + USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN, + 0x0013, 0x0000, data, datalen, LINE6_TIMEOUT * HZ, + GFP_KERNEL); + if (ret) dev_err(line6->ifcdev, "read failed (error %d)\n", ret); exit: - kfree(len); return ret; } EXPORT_SYMBOL_GPL(line6_read_data); @@ -423,12 +415,11 @@ int line6_write_data(struct usb_line6 *line6, unsigned address, void *data, if (!status) return -ENOMEM; - ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), 0x67, - USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT, - 0x0022, address, data, datalen, - LINE6_TIMEOUT * HZ); - - if (ret < 0) { + ret = usb_control_msg_send(usbdev, 0, 0x67, + USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT, + 0x0022, address, data, datalen, LINE6_TIMEOUT * HZ, + GFP_KERNEL); + if (ret) { dev_err(line6->ifcdev, "write request failed (error %d)\n", ret); goto exit; @@ -437,14 +428,11 @@ int line6_write_data(struct usb_line6 *line6, unsigned address, void *data, for (count = 0; count < LINE6_READ_WRITE_MAX_RETRIES; count++) { mdelay(LINE6_READ_WRITE_STATUS_DELAY); - ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), - 0x67, - USB_TYPE_VENDOR | USB_RECIP_DEVICE | - USB_DIR_IN, - 0x0012, 0x0000, - status, 1, LINE6_TIMEOUT * HZ); - - if (ret < 0) { + ret = usb_control_msg_recv(usbdev, 0, 0x67, + USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN, + 0x0012, 0x0000, status, 1, LINE6_TIMEOUT * HZ, + GFP_KERNEL); + if (ret) { dev_err(line6->ifcdev, "receiving status failed (error %d)\n", ret); goto exit; diff --git a/sound/usb/line6/podhd.c b/sound/usb/line6/podhd.c index eef45f7fef0d..28794a35949d 100644 --- a/sound/usb/line6/podhd.c +++ b/sound/usb/line6/podhd.c @@ -183,29 +183,25 @@ static const struct attribute_group podhd_dev_attr_group = { static int podhd_dev_start(struct usb_line6_podhd *pod) { int ret; - u8 *init_bytes; + u8 init_bytes[8]; int i; struct usb_device *usbdev = pod->line6.usbdev; - init_bytes = kmalloc(8, GFP_KERNEL); - if (!init_bytes) - return -ENOMEM; - - ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), + ret = usb_control_msg_send(usbdev, 0, 0x67, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT, 0x11, 0, - NULL, 0, LINE6_TIMEOUT * HZ); - if (ret < 0) { + NULL, 0, LINE6_TIMEOUT * HZ, GFP_KERNEL); + if (ret) { dev_err(pod->line6.ifcdev, "read request failed (error %d)\n", ret); goto exit; } /* NOTE: looks like some kind of ping message */ - ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 0x67, + ret = usb_control_msg_recv(usbdev, 0, 0x67, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN, 0x11, 0x0, - init_bytes, 3, LINE6_TIMEOUT * HZ); - if (ret < 0) { + init_bytes, 3, LINE6_TIMEOUT * HZ, GFP_KERNEL); + if (ret) { dev_err(pod->line6.ifcdev, "receive length failed (error %d)\n", ret); goto exit; @@ -220,13 +216,12 @@ static int podhd_dev_start(struct usb_line6_podhd *pod) goto exit; } - ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), + ret = usb_control_msg_send(usbdev, 0, USB_REQ_SET_FEATURE, USB_TYPE_STANDARD | USB_RECIP_DEVICE | USB_DIR_OUT, 1, 0, - NULL, 0, LINE6_TIMEOUT * HZ); + NULL, 0, LINE6_TIMEOUT * HZ, GFP_KERNEL); exit: - kfree(init_bytes); return ret; } diff --git a/sound/usb/line6/toneport.c b/sound/usb/line6/toneport.c index 94dd5e7ab2e6..4e5693c97aa4 100644 --- a/sound/usb/line6/toneport.c +++ b/sound/usb/line6/toneport.c @@ -126,11 +126,12 @@ static int toneport_send_cmd(struct usb_device *usbdev, int cmd1, int cmd2) { int ret; - ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), 0x67, - USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT, - cmd1, cmd2, NULL, 0, LINE6_TIMEOUT * HZ); + ret = usb_control_msg_send(usbdev, 0, 0x67, + USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT, + cmd1, cmd2, NULL, 0, LINE6_TIMEOUT * HZ, + GFP_KERNEL); - if (ret < 0) { + if (ret) { dev_err(&usbdev->dev, "send failed (error %d)\n", ret); return ret; }