ALSA: 6fire: make buffers DMA-able (midi)

[platform/adaptation/renesas_rcar/renesas_kernel.git] / sound / usb / 6fire / midi.c

diff --git a/sound/usb/6fire/midi.c b/sound/usb/6fire/midi.c
index 2672242..f3dd726 100644 (file)
--- a/sound/usb/6fire/midi.c
+++ b/sound/usb/6fire/midi.c
@@ -19,6 +19,10 @@
 #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;
@@ -156,6 +160,12 @@ int 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 */
@@ -169,6 +179,7 @@ int 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;
@@ -197,6 +208,9 @@ 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;
 }