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| author | Takashi Iwai <tiwai@suse.de> | 2018-03-13 11:18:57 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2018-03-13 15:37:56 +0100 |
| commit | 5730f9f744cfe20b771adc33f3b476b95d3eebba (patch) | |
| tree | 4993d43ca26c4cd6fbd1199b215d94c9ab09a6cb /sound/core | |
| parent | 491f833134ac474434e1c950925c58b2ac13ca72 (diff) | |
| download | linux-5730f9f744cfe20b771adc33f3b476b95d3eebba.tar.bz2 | |
ALSA: pcm: Remove VLA usage
A helper function used by snd_pcm_hw_refine() still keeps using VLA
for timestamps of hw constraint rules that are non-fixed size.
Let's replace the VLA with a simple kmalloc() array.
Reference: https://lkml.org/lkml/2018/3/7/621
Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core')
| -rw-r--r-- | sound/core/pcm_native.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c index 77ba50ddcf9e..756a9a3884a5 100644 --- a/sound/core/pcm_native.c +++ b/sound/core/pcm_native.c @@ -323,7 +323,7 @@ static int constrain_params_by_rules(struct snd_pcm_substream *substream, struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints; unsigned int k; - unsigned int rstamps[constrs->rules_num]; + unsigned int *rstamps; unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1]; unsigned int stamp; struct snd_pcm_hw_rule *r; @@ -331,7 +331,7 @@ static int constrain_params_by_rules(struct snd_pcm_substream *substream, struct snd_mask old_mask; struct snd_interval old_interval; bool again; - int changed; + int changed, err = 0; /* * Each application of rule has own sequence number. @@ -339,8 +339,9 @@ static int constrain_params_by_rules(struct snd_pcm_substream *substream, * Each member of 'rstamps' array represents the sequence number of * recent application of corresponding rule. */ - for (k = 0; k < constrs->rules_num; k++) - rstamps[k] = 0; + rstamps = kcalloc(constrs->rules_num, sizeof(unsigned int), GFP_KERNEL); + if (!rstamps) + return -ENOMEM; /* * Each member of 'vstamps' array represents the sequence number of @@ -398,8 +399,10 @@ retry: } changed = r->func(params, r); - if (changed < 0) - return changed; + if (changed < 0) { + err = changed; + goto out; + } /* * When the parameter is changed, notify it to the caller @@ -430,7 +433,9 @@ retry: if (again) goto retry; - return 0; + out: + kfree(rstamps); + return err; } static int fixup_unreferenced_params(struct snd_pcm_substream *substream, |