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authorTakashi Sakamoto <o-takashi@sakamocchi.jp>2017-04-14 16:46:29 +0900
committerTakashi Iwai <tiwai@suse.de>2017-04-14 14:50:36 +0200
commit98a00d3602a1c50a397893c5de26dbbe7d77804a (patch)
treeab8d0c8563e9894b7948f9bf7db5b02f74f2da55 /sound/firewire
parent27badc4c10da29b884f1ac7cc9ce13e849ce8be4 (diff)
downloadlinux-98a00d3602a1c50a397893c5de26dbbe7d77804a.tar.bz2
ALSA: firewire-tascam: use fixed-length array for message cache to async midi port
ALSA driver for TASCAM FireWire series internally allocates 4 byte buffer for asynchronous transaction to transfer MIDI messages. However, the buffer can be allocated with memory object of parent structure. This commit adds 4 byte array as a member of the structure and obsoletes the redundant allocation. This is deallocated with memory object of parent structure. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire')
-rw-r--r--sound/firewire/tascam/tascam-transaction.c15
-rw-r--r--sound/firewire/tascam/tascam.h4
2 files changed, 2 insertions, 17 deletions
diff --git a/sound/firewire/tascam/tascam-transaction.c b/sound/firewire/tascam/tascam-transaction.c
index 4e362b83d8e8..248afe663387 100644
--- a/sound/firewire/tascam/tascam-transaction.c
+++ b/sound/firewire/tascam/tascam-transaction.c
@@ -239,10 +239,6 @@ static void midi_port_work(struct work_struct *work)
int snd_fw_async_midi_port_init(struct snd_fw_async_midi_port *port,
struct fw_unit *unit)
{
- port->buf = kzalloc(4, GFP_KERNEL);
- if (port->buf == NULL)
- return -ENOMEM;
-
port->parent = fw_parent_device(unit);
port->idling = true;
port->next_ktime = 0;
@@ -253,13 +249,6 @@ int snd_fw_async_midi_port_init(struct snd_fw_async_midi_port *port,
return 0;
}
-void snd_fw_async_midi_port_destroy(struct snd_fw_async_midi_port *port)
-{
- snd_fw_async_midi_port_finish(port);
- cancel_work_sync(&port->work);
- kfree(port->buf);
-}
-
static void handle_midi_tx(struct fw_card *card, struct fw_request *request,
int tcode, int destination, int source,
int generation, unsigned long long offset,
@@ -389,7 +378,6 @@ int snd_tscm_transaction_reregister(struct snd_tscm *tscm)
void snd_tscm_transaction_unregister(struct snd_tscm *tscm)
{
__be32 reg;
- unsigned int i;
if (tscm->async_handler.callback_data == NULL)
return;
@@ -416,7 +404,4 @@ void snd_tscm_transaction_unregister(struct snd_tscm *tscm)
fw_core_remove_address_handler(&tscm->async_handler);
tscm->async_handler.callback_data = NULL;
-
- for (i = 0; i < TSCM_MIDI_OUT_PORT_MAX; i++)
- snd_fw_async_midi_port_destroy(&tscm->out_ports[i]);
}
diff --git a/sound/firewire/tascam/tascam.h b/sound/firewire/tascam/tascam.h
index de0aefe2d690..fdf352bc303f 100644
--- a/sound/firewire/tascam/tascam.h
+++ b/sound/firewire/tascam/tascam.h
@@ -54,7 +54,7 @@ struct snd_fw_async_midi_port {
struct fw_transaction transaction;
- u8 *buf;
+ u8 buf[4];
struct snd_rawmidi_substream *substream;
int consume_bytes;
@@ -148,7 +148,6 @@ void snd_tscm_stream_lock_release(struct snd_tscm *tscm);
int snd_fw_async_midi_port_init(struct snd_fw_async_midi_port *port,
struct fw_unit *unit);
-void snd_fw_async_midi_port_destroy(struct snd_fw_async_midi_port *port);
static inline void
snd_fw_async_midi_port_run(struct snd_fw_async_midi_port *port,
@@ -164,6 +163,7 @@ static inline void
snd_fw_async_midi_port_finish(struct snd_fw_async_midi_port *port)
{
port->substream = NULL;
+ cancel_work_sync(&port->work);
port->error = false;
}