From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934377AbZDJBnP (ORCPT ); Thu, 9 Apr 2009 21:43:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1763073AbZDJBmx (ORCPT ); Thu, 9 Apr 2009 21:42:53 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:62554 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1762914AbZDJBmw (ORCPT ); Thu, 9 Apr 2009 21:42:52 -0400 Message-ID: <49DEA448.1000408@cn.fujitsu.com> Date: Fri, 10 Apr 2009 09:43:36 +0800 From: Li Zefan User-Agent: Thunderbird 2.0.0.9 (X11/20071115) MIME-Version: 1.0 To: tiwai@suse.de CC: perex@perex.cz, LKML Subject: [PATCH 2/4] sound/isa: use memdup_user() References: <49DEA405.3070900@cn.fujitsu.com> In-Reply-To: <49DEA405.3070900@cn.fujitsu.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Remove open-coded memdup_user(). Signed-off-by: Li Zefan --- sound/isa/sb/sb16_csp.c | 19 ++++++++++--------- sound/isa/wavefront/wavefront_fx.c | 14 +++++--------- sound/isa/wavefront/wavefront_synth.c | 11 +++++------ 3 files changed, 20 insertions(+), 24 deletions(-) diff --git a/sound/isa/sb/sb16_csp.c b/sound/isa/sb/sb16_csp.c index 49037d0..bdc8dde 100644 --- a/sound/isa/sb/sb16_csp.c +++ b/sound/isa/sb/sb16_csp.c @@ -684,15 +684,16 @@ static int snd_sb_csp_load(struct snd_sb_csp * p, const unsigned char *buf, int static int snd_sb_csp_load_user(struct snd_sb_csp * p, const unsigned char __user *buf, int size, int load_flags) { - int err = -ENOMEM; - unsigned char *kbuf = kmalloc(size, GFP_KERNEL); - if (kbuf) { - if (copy_from_user(kbuf, buf, size)) - err = -EFAULT; - else - err = snd_sb_csp_load(p, kbuf, size, load_flags); - kfree(kbuf); - } + int err; + unsigned char *kbuf; + + kbuf = memdup_user(buf, size); + if (IS_ERR(kbuf)) + return PTR_ERR(kbuf); + + err = snd_sb_csp_load(p, kbuf, size, load_flags); + + kfree(kbuf); return err; } diff --git a/sound/isa/wavefront/wavefront_fx.c b/sound/isa/wavefront/wavefront_fx.c index a4345fc..2bb1cee 100644 --- a/sound/isa/wavefront/wavefront_fx.c +++ b/sound/isa/wavefront/wavefront_fx.c @@ -202,15 +202,11 @@ snd_wavefront_fx_ioctl (struct snd_hwdep *sdev, struct file *file, "> 512 bytes to FX\n"); return -EIO; } - page_data = kmalloc(r.data[2] * sizeof(short), GFP_KERNEL); - if (!page_data) - return -ENOMEM; - if (copy_from_user (page_data, - (unsigned char __user *) r.data[3], - r.data[2] * sizeof(short))) { - kfree(page_data); - return -EFAULT; - } + page_data = memdup_user((unsigned char __user *) + r.data[3], + r.data[2] * sizeof(short)); + if (IS_ERR(page_data)) + return PTR_ERR(page_data); pd = page_data; } diff --git a/sound/isa/wavefront/wavefront_synth.c b/sound/isa/wavefront/wavefront_synth.c index beb312c..5d4ff48 100644 --- a/sound/isa/wavefront/wavefront_synth.c +++ b/sound/isa/wavefront/wavefront_synth.c @@ -1664,12 +1664,11 @@ snd_wavefront_synth_ioctl (struct snd_hwdep *hw, struct file *file, break; case WFCTL_WFCMD: - wc = kmalloc(sizeof(*wc), GFP_KERNEL); - if (! wc) - return -ENOMEM; - if (copy_from_user (wc, argp, sizeof (*wc))) - err = -EFAULT; - else if (wavefront_synth_control (acard, wc) < 0) + wc = memdup_user(argp, sizeof(*wc)); + if (IS_ERR(wc)) + return PTR_ERR(wc); + + if (wavefront_synth_control (acard, wc) < 0) err = -EIO; else if (copy_to_user (argp, wc, sizeof (*wc))) err = -EFAULT; -- 1.5.4.rc3