Commit 5ece263f authored by Torsten Schenk's avatar Torsten Schenk Committed by Takashi Iwai
Browse files

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



Patch makes pcm buffers DMA-able by allocating each one separately.

Signed-off-by: default avatarTorsten Schenk <torsten.schenk@zoho.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent db8a38e5

sound/usb/6fire/pcm.c

+40 −1
Original line number Diff line number Diff line
@@ -582,6 +582,33 @@ static void usb6fire_pcm_init_urb(struct pcm_urb *urb, 
	urb->instance.number_of_packets = PCM_N_PACKETS_PER_URB;

}



static int usb6fire_pcm_buffers_init(struct pcm_runtime *rt)

{

	int i;



	for (i = 0; i < PCM_N_URBS; i++) {

		rt->out_urbs[i].buffer = kzalloc(PCM_N_PACKETS_PER_URB

				* PCM_MAX_PACKET_SIZE, GFP_KERNEL);

		if (!rt->out_urbs[i].buffer)

			return -ENOMEM;

		rt->in_urbs[i].buffer = kzalloc(PCM_N_PACKETS_PER_URB

				* PCM_MAX_PACKET_SIZE, GFP_KERNEL);

		if (!rt->in_urbs[i].buffer)

			return -ENOMEM;

	}

	return 0;

}



static void usb6fire_pcm_buffers_destroy(struct pcm_runtime *rt)

{

	int i;



	for (i = 0; i < PCM_N_URBS; i++) {

		kfree(rt->out_urbs[i].buffer);

		kfree(rt->in_urbs[i].buffer);

	}

}



int usb6fire_pcm_init(struct sfire_chip *chip)

{

	int i;
@@ -593,6 +620,13 @@ int usb6fire_pcm_init(struct sfire_chip *chip) 
	if (!rt)

		return -ENOMEM;



	ret = usb6fire_pcm_buffers_init(rt);

	if (ret) {

		usb6fire_pcm_buffers_destroy(rt);

		kfree(rt);

		return ret;

	}



	rt->chip = chip;

	rt->stream_state = STREAM_DISABLED;

	rt->rate = ARRAY_SIZE(rates);
@@ -614,6 +648,7 @@ int usb6fire_pcm_init(struct sfire_chip *chip) 


	ret = snd_pcm_new(chip->card, "DMX6FireUSB", 0, 1, 1, &pcm);

	if (ret < 0) {

		usb6fire_pcm_buffers_destroy(rt);

		kfree(rt);

		snd_printk(KERN_ERR PREFIX "cannot create pcm instance.\n");

		return ret;
@@ -625,6 +660,7 @@ int usb6fire_pcm_init(struct sfire_chip *chip) 
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pcm_ops);



	if (ret) {

		usb6fire_pcm_buffers_destroy(rt);

		kfree(rt);

		snd_printk(KERN_ERR PREFIX

				"error preallocating pcm buffers.\n");
@@ -669,6 +705,9 @@ void usb6fire_pcm_abort(struct sfire_chip *chip) 


void usb6fire_pcm_destroy(struct sfire_chip *chip)

{

	kfree(chip->pcm);

	struct pcm_runtime *rt = chip->pcm;



	usb6fire_pcm_buffers_destroy(rt);

	kfree(rt);

	chip->pcm = NULL;

}

sound/usb/6fire/pcm.h

+1 −1
Original line number Diff line number Diff line
@@ -32,7 +32,7 @@ struct pcm_urb { 
	struct urb instance;

	struct usb_iso_packet_descriptor packets[PCM_N_PACKETS_PER_URB];

	/* END DO NOT SEPARATE */

	u8 buffer[PCM_N_PACKETS_PER_URB * PCM_MAX_PACKET_SIZE];

	u8 *buffer;



	struct pcm_urb *peer;

};