[PATCH] ALSA: core: Drop superfluous no_free_ptr() for memdup_user() errors

[Takashi Iwai <tiwai@xxxxxxx>]

We used to wrap with no_free_ptr() for the return value from
memdup_user() with errors where the auto cleanup is applied.  This was
a workaround because the initial implementation of kfree auto-cleanup
checked only NULL pointers.

Since recently, though, the kfree auto-cleanup checks with
IS_ERR_OR_NULL() (by the commit cd7eb8f83fcf ("mm/slab: make
__free(kfree) accept error pointers")), hence those workarounds became
superfluous.  Let's drop them now.

Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
---
 sound/core/compress_offload.c |  2 +-
 sound/core/control.c          |  4 ++--
 sound/core/pcm_native.c       | 10 +++++-----
 sound/core/timer.c            |  4 ++--
 4 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/sound/core/compress_offload.c b/sound/core/compress_offload.c
index f0008fa2d839..b8c0d6edbdd1 100644
--- a/sound/core/compress_offload.c
+++ b/sound/core/compress_offload.c
@@ -581,7 +581,7 @@ snd_compr_set_params(struct snd_compr_stream *stream, unsigned long arg)
 		 */
 		params = memdup_user((void __user *)arg, sizeof(*params));
 		if (IS_ERR(params))
-			return PTR_ERR(no_free_ptr(params));
+			return PTR_ERR(params);
 
 		retval = snd_compress_check_input(params);
 		if (retval)
diff --git a/sound/core/control.c b/sound/core/control.c
index 7d7d592a8428..4f55f64c42e1 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -1249,7 +1249,7 @@ static int snd_ctl_elem_read_user(struct snd_card *card,
 
 	control = memdup_user(_control, sizeof(*control));
 	if (IS_ERR(control))
-		return PTR_ERR(no_free_ptr(control));
+		return PTR_ERR(control);
 
 	result = snd_power_ref_and_wait(card);
 	if (result)
@@ -1326,7 +1326,7 @@ static int snd_ctl_elem_write_user(struct snd_ctl_file *file,
 
 	control = memdup_user(_control, sizeof(*control));
 	if (IS_ERR(control))
-		return PTR_ERR(no_free_ptr(control));
+		return PTR_ERR(control);
 
 	card = file->card;
 	result = snd_power_ref_and_wait(card);
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 4057f9f10aee..44381514f695 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -582,7 +582,7 @@ static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
 
 	params = memdup_user(_params, sizeof(*params));
 	if (IS_ERR(params))
-		return PTR_ERR(no_free_ptr(params));
+		return PTR_ERR(params);
 
 	err = snd_pcm_hw_refine(substream, params);
 	if (err < 0)
@@ -872,7 +872,7 @@ static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
 
 	params = memdup_user(_params, sizeof(*params));
 	if (IS_ERR(params))
-		return PTR_ERR(no_free_ptr(params));
+		return PTR_ERR(params);
 
 	err = snd_pcm_hw_params(substream, params);
 	if (err < 0)
@@ -3243,7 +3243,7 @@ static int snd_pcm_xfern_frames_ioctl(struct snd_pcm_substream *substream,
 
 	bufs = memdup_user(xfern.bufs, sizeof(void *) * runtime->channels);
 	if (IS_ERR(bufs))
-		return PTR_ERR(no_free_ptr(bufs));
+		return PTR_ERR(bufs);
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 		result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
 	else
@@ -4032,7 +4032,7 @@ static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
 
 	oparams = memdup_user(_oparams, sizeof(*oparams));
 	if (IS_ERR(oparams))
-		return PTR_ERR(no_free_ptr(oparams));
+		return PTR_ERR(oparams);
 	snd_pcm_hw_convert_from_old_params(params, oparams);
 	err = snd_pcm_hw_refine(substream, params);
 	if (err < 0)
@@ -4061,7 +4061,7 @@ static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
 
 	oparams = memdup_user(_oparams, sizeof(*oparams));
 	if (IS_ERR(oparams))
-		return PTR_ERR(no_free_ptr(oparams));
+		return PTR_ERR(oparams);
 
 	snd_pcm_hw_convert_from_old_params(params, oparams);
 	err = snd_pcm_hw_params(substream, params);
diff --git a/sound/core/timer.c b/sound/core/timer.c
index 7610f102360d..1d13f6c1d506 100644
--- a/sound/core/timer.c
+++ b/sound/core/timer.c
@@ -1615,7 +1615,7 @@ static int snd_timer_user_ginfo(struct file *file,
 
 	ginfo = memdup_user(_ginfo, sizeof(*ginfo));
 	if (IS_ERR(ginfo))
-		return PTR_ERR(no_free_ptr(ginfo));
+		return PTR_ERR(ginfo);
 
 	tid = ginfo->tid;
 	memset(ginfo, 0, sizeof(*ginfo));
@@ -2190,7 +2190,7 @@ static int snd_utimer_ioctl_create(struct file *file,
 
 	utimer_info = memdup_user(_utimer_info, sizeof(*utimer_info));
 	if (IS_ERR(utimer_info))
-		return PTR_ERR(no_free_ptr(utimer_info));
+		return PTR_ERR(utimer_info);
 
 	err = snd_utimer_create(utimer_info, &utimer);
 	if (err < 0)
-- 
2.43.0