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Message-ID: <49DEA47F.9070701@cn.fujitsu.com>
Date: Fri, 10 Apr 2009 09:44:31 +0800
From: Li Zefan <lizf@...fujitsu.com>
To: tiwai@...e.de
CC: perex@...ex.cz, LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 4/4] sound/pci: use memdup_user()
Remove open-coded memdup_user().
Signed-off-by: Li Zefan <lizf@...fujitsu.com>
---
sound/pci/emu10k1/emufx.c | 41 +++++++++++++----------------------------
1 files changed, 13 insertions(+), 28 deletions(-)
diff --git a/sound/pci/emu10k1/emufx.c b/sound/pci/emu10k1/emufx.c
index 191e1cd..4b302d8 100644
--- a/sound/pci/emu10k1/emufx.c
+++ b/sound/pci/emu10k1/emufx.c
@@ -2493,24 +2493,17 @@ static int snd_emu10k1_fx8010_ioctl(struct snd_hwdep * hw, struct file *file, un
case SNDRV_EMU10K1_IOCTL_CODE_POKE:
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- icode = kmalloc(sizeof(*icode), GFP_KERNEL);
- if (icode == NULL)
- return -ENOMEM;
- if (copy_from_user(icode, argp, sizeof(*icode))) {
- kfree(icode);
- return -EFAULT;
- }
+
+ icode = memdup_user(argp, sizeof(*icode));
+ if (IS_ERR(icode))
+ return PTR_ERR(icode);
res = snd_emu10k1_icode_poke(emu, icode);
kfree(icode);
return res;
case SNDRV_EMU10K1_IOCTL_CODE_PEEK:
- icode = kmalloc(sizeof(*icode), GFP_KERNEL);
- if (icode == NULL)
- return -ENOMEM;
- if (copy_from_user(icode, argp, sizeof(*icode))) {
- kfree(icode);
- return -EFAULT;
- }
+ icode = memdup_user(argp, sizeof(*icode));
+ if (IS_ERR(icode))
+ return PTR_ERR(icode);
res = snd_emu10k1_icode_peek(emu, icode);
if (res == 0 && copy_to_user(argp, icode, sizeof(*icode))) {
kfree(icode);
@@ -2519,24 +2512,16 @@ static int snd_emu10k1_fx8010_ioctl(struct snd_hwdep * hw, struct file *file, un
kfree(icode);
return res;
case SNDRV_EMU10K1_IOCTL_PCM_POKE:
- ipcm = kmalloc(sizeof(*ipcm), GFP_KERNEL);
- if (ipcm == NULL)
- return -ENOMEM;
- if (copy_from_user(ipcm, argp, sizeof(*ipcm))) {
- kfree(ipcm);
- return -EFAULT;
- }
+ ipcm = memdup_user(argp, sizeof(*ipcm));
+ if (IS_ERR(ipcm))
+ return PTR_ERR(ipcm);
res = snd_emu10k1_ipcm_poke(emu, ipcm);
kfree(ipcm);
return res;
case SNDRV_EMU10K1_IOCTL_PCM_PEEK:
- ipcm = kzalloc(sizeof(*ipcm), GFP_KERNEL);
- if (ipcm == NULL)
- return -ENOMEM;
- if (copy_from_user(ipcm, argp, sizeof(*ipcm))) {
- kfree(ipcm);
- return -EFAULT;
- }
+ ipcm = memdup_user(argp, sizeof(*ipcm));
+ if (IS_ERR(ipcm))
+ return PTR_ERR(ipcm);
res = snd_emu10k1_ipcm_peek(emu, ipcm);
if (res == 0 && copy_to_user(argp, ipcm, sizeof(*ipcm))) {
kfree(ipcm);
--
1.5.4.rc3
--
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