diff options
author | Takashi Iwai <tiwai@suse.de> | 2018-07-13 00:06:51 +0300 |
---|---|---|
committer | Takashi Iwai <tiwai@suse.de> | 2018-07-29 10:28:12 +0300 |
commit | f69548ffafcc4942022f16f2f192b24143de1dba (patch) | |
tree | 2a88b18a7d591cebd74af9cc53a59226db670b42 /sound/pci/hda/patch_hdmi.c | |
parent | fad56c895f1f33f9063da558067307b00d44d40d (diff) | |
download | linux-f69548ffafcc4942022f16f2f192b24143de1dba.tar.xz |
ALSA: hda/hdmi: Use single mutex unlock in error paths
Instead of calling mutex_unlock() at each error path multiple times,
take the standard goto-and-a-single-unlock approach. This will
simplify the code and make easier to find the unbalanced mutex locks.
No functional changes, but only the code readability improvement as a
preliminary work for further changes.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/hda/patch_hdmi.c')
-rw-r--r-- | sound/pci/hda/patch_hdmi.c | 67 |
1 files changed, 33 insertions, 34 deletions
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index ee56359be9ee..cb587dce67a9 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -339,13 +339,13 @@ static int hdmi_eld_ctl_info(struct snd_kcontrol *kcontrol, if (!per_pin) { /* no pin is bound to the pcm */ uinfo->count = 0; - mutex_unlock(&spec->pcm_lock); - return 0; + goto unlock; } eld = &per_pin->sink_eld; uinfo->count = eld->eld_valid ? eld->eld_size : 0; - mutex_unlock(&spec->pcm_lock); + unlock: + mutex_unlock(&spec->pcm_lock); return 0; } @@ -357,6 +357,7 @@ static int hdmi_eld_ctl_get(struct snd_kcontrol *kcontrol, struct hdmi_spec_per_pin *per_pin; struct hdmi_eld *eld; int pcm_idx; + int err = 0; pcm_idx = kcontrol->private_value; mutex_lock(&spec->pcm_lock); @@ -365,16 +366,15 @@ static int hdmi_eld_ctl_get(struct snd_kcontrol *kcontrol, /* no pin is bound to the pcm */ memset(ucontrol->value.bytes.data, 0, ARRAY_SIZE(ucontrol->value.bytes.data)); - mutex_unlock(&spec->pcm_lock); - return 0; + goto unlock; } - eld = &per_pin->sink_eld; + eld = &per_pin->sink_eld; if (eld->eld_size > ARRAY_SIZE(ucontrol->value.bytes.data) || eld->eld_size > ELD_MAX_SIZE) { - mutex_unlock(&spec->pcm_lock); snd_BUG(); - return -EINVAL; + err = -EINVAL; + goto unlock; } memset(ucontrol->value.bytes.data, 0, @@ -382,9 +382,10 @@ static int hdmi_eld_ctl_get(struct snd_kcontrol *kcontrol, if (eld->eld_valid) memcpy(ucontrol->value.bytes.data, eld->eld_buffer, eld->eld_size); - mutex_unlock(&spec->pcm_lock); - return 0; + unlock: + mutex_unlock(&spec->pcm_lock); + return err; } static const struct snd_kcontrol_new eld_bytes_ctl = { @@ -1209,8 +1210,8 @@ static int hdmi_pcm_open(struct hda_pcm_stream *hinfo, pin_idx = hinfo_to_pin_index(codec, hinfo); if (!spec->dyn_pcm_assign) { if (snd_BUG_ON(pin_idx < 0)) { - mutex_unlock(&spec->pcm_lock); - return -EINVAL; + err = -EINVAL; + goto unlock; } } else { /* no pin is assigned to the PCM @@ -1218,16 +1219,13 @@ static int hdmi_pcm_open(struct hda_pcm_stream *hinfo, */ if (pin_idx < 0) { err = hdmi_pcm_open_no_pin(hinfo, codec, substream); - mutex_unlock(&spec->pcm_lock); - return err; + goto unlock; } } err = hdmi_choose_cvt(codec, pin_idx, &cvt_idx); - if (err < 0) { - mutex_unlock(&spec->pcm_lock); - return err; - } + if (err < 0) + goto unlock; per_cvt = get_cvt(spec, cvt_idx); /* Claim converter */ @@ -1264,12 +1262,11 @@ static int hdmi_pcm_open(struct hda_pcm_stream *hinfo, per_cvt->assigned = 0; hinfo->nid = 0; snd_hda_spdif_ctls_unassign(codec, pcm_idx); - mutex_unlock(&spec->pcm_lock); - return -ENODEV; + err = -ENODEV; + goto unlock; } } - mutex_unlock(&spec->pcm_lock); /* Store the updated parameters */ runtime->hw.channels_min = hinfo->channels_min; runtime->hw.channels_max = hinfo->channels_max; @@ -1278,7 +1275,9 @@ static int hdmi_pcm_open(struct hda_pcm_stream *hinfo, snd_pcm_hw_constraint_step(substream->runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 2); - return 0; + unlock: + mutex_unlock(&spec->pcm_lock); + return err; } /* @@ -1867,7 +1866,7 @@ static int generic_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo, struct snd_pcm_runtime *runtime = substream->runtime; bool non_pcm; int pinctl; - int err; + int err = 0; mutex_lock(&spec->pcm_lock); pin_idx = hinfo_to_pin_index(codec, hinfo); @@ -1879,13 +1878,12 @@ static int generic_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo, pin_cvt_fixup(codec, NULL, cvt_nid); snd_hda_codec_setup_stream(codec, cvt_nid, stream_tag, 0, format); - mutex_unlock(&spec->pcm_lock); - return 0; + goto unlock; } if (snd_BUG_ON(pin_idx < 0)) { - mutex_unlock(&spec->pcm_lock); - return -EINVAL; + err = -EINVAL; + goto unlock; } per_pin = get_pin(spec, pin_idx); pin_nid = per_pin->pin_nid; @@ -1924,6 +1922,7 @@ static int generic_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo, /* snd_hda_set_dev_select() has been called before */ err = spec->ops.setup_stream(codec, cvt_nid, pin_nid, stream_tag, format); + unlock: mutex_unlock(&spec->pcm_lock); return err; } @@ -1945,6 +1944,7 @@ static int hdmi_pcm_close(struct hda_pcm_stream *hinfo, struct hdmi_spec_per_cvt *per_cvt; struct hdmi_spec_per_pin *per_pin; int pinctl; + int err = 0; if (hinfo->nid) { pcm_idx = hinfo_to_pcm_index(codec, hinfo); @@ -1963,14 +1963,12 @@ static int hdmi_pcm_close(struct hda_pcm_stream *hinfo, snd_hda_spdif_ctls_unassign(codec, pcm_idx); clear_bit(pcm_idx, &spec->pcm_in_use); pin_idx = hinfo_to_pin_index(codec, hinfo); - if (spec->dyn_pcm_assign && pin_idx < 0) { - mutex_unlock(&spec->pcm_lock); - return 0; - } + if (spec->dyn_pcm_assign && pin_idx < 0) + goto unlock; if (snd_BUG_ON(pin_idx < 0)) { - mutex_unlock(&spec->pcm_lock); - return -EINVAL; + err = -EINVAL; + goto unlock; } per_pin = get_pin(spec, pin_idx); @@ -1989,10 +1987,11 @@ static int hdmi_pcm_close(struct hda_pcm_stream *hinfo, per_pin->setup = false; per_pin->channels = 0; mutex_unlock(&per_pin->lock); + unlock: mutex_unlock(&spec->pcm_lock); } - return 0; + return err; } static const struct hda_pcm_ops generic_ops = { |