diff options
| author | Torsten Schenk <torsten.schenk@zoho.com> | 2013-08-11 13:11:35 +0400 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2013-09-10 04:57:22 +0400 |
| commit | 81b043782e78a7cdb4ee869d35e493756237a775 (patch) | |
| tree | 33c2c76afb301770371b4ead78891f6077ba71ee /sound | |
| parent | ea8e224015470abda7cda25600d46515115d4b7d (diff) | |
| download | linux-81b043782e78a7cdb4ee869d35e493756237a775.tar.xz | |
ALSA: 6fire: make buffers DMA-able (midi)
commit 4c2aee0032b70083dafebd733ed9c774633b2fa3 upstream.
Patch makes midi output buffer DMA-able by allocating it separately.
Signed-off-by: Torsten Schenk <torsten.schenk@zoho.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/usb/6fire/midi.c | 16 | ||||
| -rw-r--r-- | sound/usb/6fire/midi.h | 6 |
2 files changed, 16 insertions, 6 deletions
diff --git a/sound/usb/6fire/midi.c b/sound/usb/6fire/midi.c index 13f4509dce2b..8283c5de3c0d 100644 --- a/sound/usb/6fire/midi.c +++ b/sound/usb/6fire/midi.c @@ -20,6 +20,10 @@ #include "chip.h" #include "comm.h" +enum { + MIDI_BUFSIZE = 64 +}; + static void usb6fire_midi_out_handler(struct urb *urb) { struct midi_runtime *rt = urb->context; @@ -157,6 +161,12 @@ int __devinit usb6fire_midi_init(struct sfire_chip *chip) if (!rt) return -ENOMEM; + rt->out_buffer = kzalloc(MIDI_BUFSIZE, GFP_KERNEL); + if (!rt->out_buffer) { + kfree(rt); + return -ENOMEM; + } + rt->chip = chip; rt->in_received = usb6fire_midi_in_received; rt->out_buffer[0] = 0x80; /* 'send midi' command */ @@ -170,6 +180,7 @@ int __devinit usb6fire_midi_init(struct sfire_chip *chip) ret = snd_rawmidi_new(chip->card, "6FireUSB", 0, 1, 1, &rt->instance); if (ret < 0) { + kfree(rt->out_buffer); kfree(rt); snd_printk(KERN_ERR PREFIX "unable to create midi.\n"); return ret; @@ -198,6 +209,9 @@ void usb6fire_midi_abort(struct sfire_chip *chip) void usb6fire_midi_destroy(struct sfire_chip *chip) { - kfree(chip->midi); + struct midi_runtime *rt = chip->midi; + + kfree(rt->out_buffer); + kfree(rt); chip->midi = NULL; } diff --git a/sound/usb/6fire/midi.h b/sound/usb/6fire/midi.h index 97a7bf669135..7f8f4488ad29 100644 --- a/sound/usb/6fire/midi.h +++ b/sound/usb/6fire/midi.h @@ -17,10 +17,6 @@ #include "common.h" -enum { - MIDI_BUFSIZE = 64 -}; - struct midi_runtime { struct sfire_chip *chip; struct snd_rawmidi *instance; @@ -33,7 +29,7 @@ struct midi_runtime { struct snd_rawmidi_substream *out; struct urb out_urb; u8 out_serial; /* serial number of out packet */ - u8 out_buffer[MIDI_BUFSIZE]; + u8 *out_buffer; int buffer_offset; void (*in_received)(struct midi_runtime *rt, u8 *data, int length); |