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authorLi Zefan <lizf@cn.fujitsu.com>2009-04-10 09:43:08 +0800
committerTakashi Iwai <tiwai@suse.de>2009-04-14 12:39:12 +0200
commitef44a1ec6eeef189998f84e7230e1d3535b01074 (patch)
tree0baa5cc0bf27af13469c75bcb89cc55e448f45dd /sound/core/pcm_native.c
parent577c9c456f0e1371cbade38eaf91ae8e8a308555 (diff)
downloadlinux-2.6.34-ux500-ef44a1ec6eeef189998f84e7230e1d3535b01074.tar.gz
ALSA: sound/core: use memdup_user()
Remove open-coded memdup_user(). Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/pcm_native.c')
-rw-r--r--sound/core/pcm_native.c93
1 files changed, 35 insertions, 58 deletions
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index a151fb01ba8..fc6f98e257d 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -327,21 +327,16 @@ static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params;
int err;
- params = kmalloc(sizeof(*params), GFP_KERNEL);
- if (!params) {
- err = -ENOMEM;
- goto out;
- }
- if (copy_from_user(params, _params, sizeof(*params))) {
- err = -EFAULT;
- goto out;
- }
+ params = memdup_user(_params, sizeof(*params));
+ if (IS_ERR(params))
+ return PTR_ERR(params);
+
err = snd_pcm_hw_refine(substream, params);
if (copy_to_user(_params, params, sizeof(*params))) {
if (!err)
err = -EFAULT;
}
-out:
+
kfree(params);
return err;
}
@@ -465,21 +460,16 @@ static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params;
int err;
- params = kmalloc(sizeof(*params), GFP_KERNEL);
- if (!params) {
- err = -ENOMEM;
- goto out;
- }
- if (copy_from_user(params, _params, sizeof(*params))) {
- err = -EFAULT;
- goto out;
- }
+ params = memdup_user(_params, sizeof(*params));
+ if (IS_ERR(params))
+ return PTR_ERR(params);
+
err = snd_pcm_hw_params(substream, params);
if (copy_to_user(_params, params, sizeof(*params))) {
if (!err)
err = -EFAULT;
}
-out:
+
kfree(params);
return err;
}
@@ -2593,13 +2583,11 @@ static int snd_pcm_playback_ioctl1(struct file *file,
return -EFAULT;
if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
return -EFAULT;
- bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
- if (bufs == NULL)
- return -ENOMEM;
- if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
- kfree(bufs);
- return -EFAULT;
- }
+
+ bufs = memdup_user(xfern.bufs,
+ sizeof(void *) * runtime->channels);
+ if (IS_ERR(bufs))
+ return PTR_ERR(bufs);
result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
kfree(bufs);
__put_user(result, &_xfern->result);
@@ -2675,13 +2663,11 @@ static int snd_pcm_capture_ioctl1(struct file *file,
return -EFAULT;
if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
return -EFAULT;
- bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
- if (bufs == NULL)
- return -ENOMEM;
- if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
- kfree(bufs);
- return -EFAULT;
- }
+
+ bufs = memdup_user(xfern.bufs,
+ sizeof(void *) * runtime->channels);
+ if (IS_ERR(bufs))
+ return PTR_ERR(bufs);
result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
kfree(bufs);
__put_user(result, &_xfern->result);
@@ -3312,18 +3298,12 @@ static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
int err;
params = kmalloc(sizeof(*params), GFP_KERNEL);
- if (!params) {
- err = -ENOMEM;
- goto out;
- }
- oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
- if (!oparams) {
- err = -ENOMEM;
- goto out;
- }
+ if (!params)
+ return -ENOMEM;
- if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
- err = -EFAULT;
+ oparams = memdup_user(_oparams, sizeof(*oparams));
+ if (IS_ERR(oparams)) {
+ err = PTR_ERR(oparams);
goto out;
}
snd_pcm_hw_convert_from_old_params(params, oparams);
@@ -3333,9 +3313,10 @@ static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
if (!err)
err = -EFAULT;
}
+
+ kfree(oparams);
out:
kfree(params);
- kfree(oparams);
return err;
}
@@ -3347,17 +3328,12 @@ static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
int err;
params = kmalloc(sizeof(*params), GFP_KERNEL);
- if (!params) {
- err = -ENOMEM;
- goto out;
- }
- oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
- if (!oparams) {
- err = -ENOMEM;
- goto out;
- }
- if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
- err = -EFAULT;
+ if (!params)
+ return -ENOMEM;
+
+ oparams = memdup_user(_oparams, sizeof(*oparams));
+ if (IS_ERR(oparams)) {
+ err = PTR_ERR(oparams);
goto out;
}
snd_pcm_hw_convert_from_old_params(params, oparams);
@@ -3367,9 +3343,10 @@ static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
if (!err)
err = -EFAULT;
}
+
+ kfree(oparams);
out:
kfree(params);
- kfree(oparams);
return err;
}
#endif /* CONFIG_SND_SUPPORT_OLD_API */