[PATCH] ALSA: bebob: Use a signed return type for get_formation_index

From: Lucas Tanure
Date: Mon Jan 25 2016 - 16:31:05 EST


The return type "unsigned int" was used by the get_formation_index function
despite of the aspect that it will eventually return a negative error code.
So, change to signed int and get index by reference in the parameters.

Done with the help of Coccinelle.

Signed-off-by: Lucas Tanure <tanure@xxxxxxxxx>
---
sound/firewire/bebob/bebob_stream.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/sound/firewire/bebob/bebob_stream.c b/sound/firewire/bebob/bebob_stream.c
index 926e5dc..79940e3 100644
--- a/sound/firewire/bebob/bebob_stream.c
+++ b/sound/firewire/bebob/bebob_stream.c
@@ -47,14 +47,15 @@ static const unsigned int bridgeco_freq_table[] = {
[6] = 0x07,
};

-static unsigned int
-get_formation_index(unsigned int rate)
+static int
+get_formation_index(unsigned int rate, unsigned int *index)
{
unsigned int i;

for (i = 0; i < ARRAY_SIZE(snd_bebob_rate_table); i++) {
if (snd_bebob_rate_table[i] == rate)
- return i;
+ *index = i;
+ return 0;
}
return -EINVAL;
}
@@ -425,7 +426,9 @@ make_both_connections(struct snd_bebob *bebob, unsigned int rate)
goto end;

/* confirm params for both streams */
- index = get_formation_index(rate);
+ err = get_formation_index(rate, &index);
+ if (err < 0)
+ goto end;
pcm_channels = bebob->tx_stream_formations[index].pcm;
midi_channels = bebob->tx_stream_formations[index].midi;
err = amdtp_am824_set_parameters(&bebob->tx_stream, rate,
--
2.7.0