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authorClemens Ladisch <clemens@ladisch.de>2011-09-04 22:15:44 +0200
committerClemens Ladisch <clemens@ladisch.de>2013-10-20 22:07:57 +0200
commit20b65dd040ce38e2bc0fa3cae13b954c865b61fe (patch)
tree27b8ae49b43b2b6b4e6635128936ebfcfd20d75c
parent9dd81e3143b57d1bf7e8377ab29b86090baa55a8 (diff)
downloadlinux-20b65dd040ce38e2bc0fa3cae13b954c865b61fe.tar.bz2
ALSA: firewire: introduce amdtp_out_stream_running()
Introduce the helper function amdtp_out_stream_running(). This makes many checks in amdtp.c clearer and frees the device drivers from having to track this with a separate variable. Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
-rw-r--r--sound/firewire/amdtp.c10
-rw-r--r--sound/firewire/amdtp.h6
-rw-r--r--sound/firewire/dice.c17
-rw-r--r--sound/firewire/speakers.c8
4 files changed, 18 insertions, 23 deletions
diff --git a/sound/firewire/amdtp.c b/sound/firewire/amdtp.c
index efb2e2947ce7..d56b8e736b7d 100644
--- a/sound/firewire/amdtp.c
+++ b/sound/firewire/amdtp.c
@@ -59,7 +59,7 @@ EXPORT_SYMBOL(amdtp_out_stream_init);
*/
void amdtp_out_stream_destroy(struct amdtp_out_stream *s)
{
- WARN_ON(!IS_ERR(s->context));
+ WARN_ON(amdtp_out_stream_running(s));
mutex_destroy(&s->mutex);
fw_unit_put(s->unit);
}
@@ -89,7 +89,7 @@ void amdtp_out_stream_set_rate(struct amdtp_out_stream *s, unsigned int rate)
};
unsigned int sfc;
- if (WARN_ON(!IS_ERR(s->context)))
+ if (WARN_ON(amdtp_out_stream_running(s)))
return;
for (sfc = 0; sfc < ARRAY_SIZE(rate_info); ++sfc)
@@ -145,7 +145,7 @@ static void amdtp_write_s32(struct amdtp_out_stream *s,
void amdtp_out_stream_set_pcm_format(struct amdtp_out_stream *s,
snd_pcm_format_t format)
{
- if (WARN_ON(!IS_ERR(s->context)))
+ if (WARN_ON(amdtp_out_stream_running(s)))
return;
switch (format) {
@@ -481,7 +481,7 @@ int amdtp_out_stream_start(struct amdtp_out_stream *s, int channel, int speed)
mutex_lock(&s->mutex);
- if (WARN_ON(!IS_ERR(s->context) ||
+ if (WARN_ON(amdtp_out_stream_running(s) ||
(!s->pcm_channels && !s->midi_ports))) {
err = -EBADFD;
goto err_unlock;
@@ -577,7 +577,7 @@ void amdtp_out_stream_stop(struct amdtp_out_stream *s)
{
mutex_lock(&s->mutex);
- if (IS_ERR(s->context)) {
+ if (!amdtp_out_stream_running(s)) {
mutex_unlock(&s->mutex);
return;
}
diff --git a/sound/firewire/amdtp.h b/sound/firewire/amdtp.h
index fd4ce3030279..28b1bf5891e6 100644
--- a/sound/firewire/amdtp.h
+++ b/sound/firewire/amdtp.h
@@ -1,6 +1,7 @@
#ifndef SOUND_FIREWIRE_AMDTP_H_INCLUDED
#define SOUND_FIREWIRE_AMDTP_H_INCLUDED
+#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/mutex.h>
#include "packets-buffer.h"
@@ -92,6 +93,11 @@ void amdtp_out_stream_pcm_prepare(struct amdtp_out_stream *s);
unsigned long amdtp_out_stream_pcm_pointer(struct amdtp_out_stream *s);
void amdtp_out_stream_pcm_abort(struct amdtp_out_stream *s);
+static inline bool amdtp_out_stream_running(struct amdtp_out_stream *s)
+{
+ return !IS_ERR(s->context);
+}
+
/**
* amdtp_out_stream_set_pcm - configure format of PCM samples
* @s: the AMDTP output stream to be configured
diff --git a/sound/firewire/dice.c b/sound/firewire/dice.c
index ef04089bde7f..3591aebd1bb7 100644
--- a/sound/firewire/dice.c
+++ b/sound/firewire/dice.c
@@ -246,7 +246,6 @@ struct dice {
int dev_lock_count; /* > 0 driver, < 0 userspace */
bool dev_lock_changed;
bool global_enabled;
- bool stream_running;
wait_queue_head_t hwdep_wait;
u32 notification_bits;
struct snd_pcm_substream *pcm;
@@ -654,7 +653,7 @@ static int dice_stream_start_packets(struct dice *dice)
{
int err;
- if (dice->stream_running)
+ if (amdtp_out_stream_running(&dice->stream))
return 0;
err = amdtp_out_stream_start(&dice->stream, dice->resources.channel,
@@ -668,8 +667,6 @@ static int dice_stream_start_packets(struct dice *dice)
return err;
}
- dice->stream_running = true;
-
return 0;
}
@@ -712,14 +709,10 @@ error:
static void dice_stream_stop_packets(struct dice *dice)
{
- if (!dice->stream_running)
- return;
-
- dice_enable_clear(dice);
-
- amdtp_out_stream_stop(&dice->stream);
-
- dice->stream_running = false;
+ if (amdtp_out_stream_running(&dice->stream)) {
+ dice_enable_clear(dice);
+ amdtp_out_stream_stop(&dice->stream);
+ }
}
static void dice_stream_stop(struct dice *dice)
diff --git a/sound/firewire/speakers.c b/sound/firewire/speakers.c
index 2c6386503940..0ac56304baff 100644
--- a/sound/firewire/speakers.c
+++ b/sound/firewire/speakers.c
@@ -53,7 +53,6 @@ struct fwspk {
struct mutex mutex;
struct cmp_connection connection;
struct amdtp_out_stream stream;
- bool stream_running;
bool mute;
s16 volume[6];
s16 volume_min;
@@ -189,10 +188,9 @@ static int fwspk_close(struct snd_pcm_substream *substream)
static void fwspk_stop_stream(struct fwspk *fwspk)
{
- if (fwspk->stream_running) {
+ if (amdtp_out_stream_running(&fwspk->stream)) {
amdtp_out_stream_stop(&fwspk->stream);
cmp_connection_break(&fwspk->connection);
- fwspk->stream_running = false;
}
}
@@ -286,7 +284,7 @@ static int fwspk_prepare(struct snd_pcm_substream *substream)
if (amdtp_out_streaming_error(&fwspk->stream))
fwspk_stop_stream(fwspk);
- if (!fwspk->stream_running) {
+ if (!amdtp_out_stream_running(&fwspk->stream)) {
err = cmp_connection_establish(&fwspk->connection,
amdtp_out_stream_get_max_payload(&fwspk->stream));
if (err < 0)
@@ -297,8 +295,6 @@ static int fwspk_prepare(struct snd_pcm_substream *substream)
fwspk->connection.speed);
if (err < 0)
goto err_connection;
-
- fwspk->stream_running = true;
}
mutex_unlock(&fwspk->mutex);