Re: [PATCH v2] ALSA: Fireface: Use common error handling code in pcm_open()

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On Aug 23 2017 21:54, SF Markus Elfring wrote:
From: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
Date: Wed, 23 Aug 2017 14:45:20 +0200

Add a jump target so that a bit of exception handling can be better reused
at the end of this function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
---

v2:
It seems that a source code adjustment was requested by Takashi Sakamoto
for another if branch.

  sound/firewire/fireface/ff-pcm.c | 20 ++++++++++----------
  1 file changed, 10 insertions(+), 10 deletions(-)

Reviewed-by: Takashi Sakamoto <o-takashi@xxxxxxxxxxxxx>

diff --git a/sound/firewire/fireface/ff-pcm.c b/sound/firewire/fireface/ff-pcm.c
index d12a0e3a4219..e3c16308363d 100644
--- a/sound/firewire/fireface/ff-pcm.c
+++ b/sound/firewire/fireface/ff-pcm.c
@@ -138,16 +138,12 @@ static int pcm_open(struct snd_pcm_substream *substream)
  		return err;
err = pcm_init_hw_params(ff, substream);
-	if (err < 0) {
-		snd_ff_stream_lock_release(ff);
-		return err;
-	}
+	if (err < 0)
+		goto release_lock;
err = ff->spec->protocol->get_clock(ff, &rate, &src);
-	if (err < 0) {
-		snd_ff_stream_lock_release(ff);
-		return err;
-	}
+	if (err < 0)
+		goto release_lock;
if (src != SND_FF_CLOCK_SRC_INTERNAL) {
  		for (i = 0; i < CIP_SFC_COUNT; ++i) {
@@ -159,8 +155,8 @@ static int pcm_open(struct snd_pcm_substream *substream)
  		 * streaming engine can't support.
  		 */
  		if (i >= CIP_SFC_COUNT) {
-			snd_ff_stream_lock_release(ff);
-			return -EIO;
+			err = -EIO;
+			goto release_lock;
  		}
substream->runtime->hw.rate_min = rate;
@@ -177,6 +173,10 @@ static int pcm_open(struct snd_pcm_substream *substream)
  	snd_pcm_set_sync(substream);
return 0;
+
+release_lock:
+	snd_ff_stream_lock_release(ff);
+	return err;
  }
static int pcm_close(struct snd_pcm_substream *substream)


Thanks

Takashi Sakamoto
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