Re: [PATCH 1/3] ALSA: bebob: Use common error handling code in snd_bebob_stream_start_duplex()

From: Takashi Sakamoto
Date: Sat Sep 23 2017 - 23:51:04 EST


Hi,

On Sep 6 2017 19:22, SF Markus Elfring wrote:
From: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
Date: Wed, 6 Sep 2017 11:40:53 +0200

Add jump targets 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>
---
sound/firewire/bebob/bebob_stream.c | 21 ++++++++++-----------
1 file changed, 10 insertions(+), 11 deletions(-)

diff --git a/sound/firewire/bebob/bebob_stream.c b/sound/firewire/bebob/bebob_stream.c
index 4d3034a68bdf..bc9e42b6368e 100644
--- a/sound/firewire/bebob/bebob_stream.c
+++ b/sound/firewire/bebob/bebob_stream.c
...
@@ -666,9 +661,7 @@ int snd_bebob_stream_start_duplex(struct snd_bebob *bebob, unsigned int rate)
if (err < 0) {
dev_err(&bebob->unit->device,
"fail to run AMDTP slave stream:%d\n", err);
- amdtp_stream_stop(&bebob->rx_stream);
- break_both_connections(bebob);
- goto end;
+ goto stop_rx_stream;
}
/* wait first callback */

After the above code block, we have below code block.

658 /* start slave if needed */
659 if (!amdtp_stream_running(&bebob->tx_stream)) {
660 err = start_stream(bebob, &bebob->tx_stream, rate);
661 if (err < 0) {
662 dev_err(&bebob->unit->device,
663 "fail to run AMDTP slave stream:%d\n", err);
664 goto stop_rx_stream;
665 }
666
667 /* wait first callback */
668 if (!amdtp_stream_wait_callback(&bebob->tx_stream,
669 CALLBACK_TIMEOUT)) {
670 amdtp_stream_stop(&bebob->tx_stream);
671 amdtp_stream_stop(&bebob->rx_stream);
672 break_both_connections(bebob);
673 err = -ETIMEDOUT;
674 }
675 }

I think it better to apply your solution too in the above to keep code consistency.

@@ -682,6 +675,12 @@ int snd_bebob_stream_start_duplex(struct snd_bebob *bebob, unsigned int rate)
}
end:
return err;
+
+stop_rx_stream:
+ amdtp_stream_stop(&bebob->rx_stream);
+break_connections:
+ break_both_connections(bebob);
+ return err;
}
void snd_bebob_stream_stop_duplex(struct snd_bebob *bebob)

For the other patches, I can find no merit to apply except for reduction of the number of characters included in the file.


Thanks

Takashi Sakamoto