From: Li Zefan <lizf@cn.fujitsu.com>
To: tiwai@suse.de
Cc: perex@perex.cz, LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH 2/4] sound/isa: use memdup_user()
Date: Fri, 10 Apr 2009 09:43:36 +0800 [thread overview]
Message-ID: <49DEA448.1000408@cn.fujitsu.com> (raw)
In-Reply-To: <49DEA405.3070900@cn.fujitsu.com>
Remove open-coded memdup_user().
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
---
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
next prev parent reply other threads:[~2009-04-10 1:43 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-10 1:42 [PATCH 0/4] sound: use memdup_user() Li Zefan
2009-04-10 1:43 ` [PATCH 1/4] sound/core: " Li Zefan
2009-04-10 1:43 ` Li Zefan [this message]
2009-04-10 1:43 ` [PATCH] sound/usb: " Li Zefan
2009-04-10 1:44 ` [PATCH 4/4] sound/pci: " Li Zefan
2009-04-14 12:06 ` [PATCH 0/4] sound: " Takashi Iwai
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