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sound fixes for 3.11-rc5 

A couple of USB-audio fixes that should also go to stable kernels.
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Merge tag 'sound-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "A couple of USB-audio fixes that should also go to stable kernels"

* tag 'sound-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: usb-audio: do not trust too-big wMaxPacketSize values
  ALSA: 6fire: fix DMA issues with URB transfer_buffer usage
This commit is contained in:
Linus Torvalds 2013-08-10 13:00:56 -07:00
parent 8ae3f1d095 57e6dae108
commit 1e24f76e23
3 changed files with 40 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
sound/usb/6fire/comm.c
View File

@ -110,19 +110,37 @@ static int usb6fire_comm_send_buffer(u8 *buffer, struct usb_device *dev)
static int usb6fire_comm_write8(struct comm_runtime *rt, u8 request,
u8 reg, u8 value)
{
u8 buffer[13]; /* 13: maximum length of message */
u8 *buffer;
int ret;
/* 13: maximum length of message */
buffer = kmalloc(13, GFP_KERNEL);
if (!buffer)
return -ENOMEM;
usb6fire_comm_init_buffer(buffer, 0x00, request, reg, value, 0x00);
return usb6fire_comm_send_buffer(buffer, rt->chip->dev);
ret = usb6fire_comm_send_buffer(buffer, rt->chip->dev);
kfree(buffer);
return ret;
}
static int usb6fire_comm_write16(struct comm_runtime *rt, u8 request,
u8 reg, u8 vl, u8 vh)
{
u8 buffer[13]; /* 13: maximum length of message */
u8 *buffer;
int ret;
/* 13: maximum length of message */
buffer = kmalloc(13, GFP_KERNEL);
if (!buffer)
return -ENOMEM;
usb6fire_comm_init_buffer(buffer, 0x00, request, reg, vl, vh);
return usb6fire_comm_send_buffer(buffer, rt->chip->dev);
ret = usb6fire_comm_send_buffer(buffer, rt->chip->dev);
kfree(buffer);
return ret;
}
int usb6fire_comm_init(struct sfire_chip *chip)
@ -135,6 +153,12 @@ int usb6fire_comm_init(struct sfire_chip *chip)
if (!rt)
return -ENOMEM;
rt->receiver_buffer = kzalloc(COMM_RECEIVER_BUFSIZE, GFP_KERNEL);
if (!rt->receiver_buffer) {
kfree(rt);
return -ENOMEM;
}
urb = &rt->receiver;
rt->serial = 1;
rt->chip = chip;
@ -153,6 +177,7 @@ int usb6fire_comm_init(struct sfire_chip *chip)
urb->interval = 1;
ret = usb_submit_urb(urb, GFP_KERNEL);
if (ret < 0) {
kfree(rt->receiver_buffer);
kfree(rt);
snd_printk(KERN_ERR PREFIX "cannot create comm data receiver.");
return ret;
@ -171,6 +196,9 @@ void usb6fire_comm_abort(struct sfire_chip *chip)
void usb6fire_comm_destroy(struct sfire_chip *chip)
{
kfree(chip->comm);
struct comm_runtime *rt = chip->comm;
kfree(rt->receiver_buffer);
kfree(rt);
chip->comm = NULL;
}

2
sound/usb/6fire/comm.h
View File

@ -24,7 +24,7 @@ struct comm_runtime {
struct sfire_chip *chip;
struct urb receiver;
u8 receiver_buffer[COMM_RECEIVER_BUFSIZE];
u8 *receiver_buffer;
u8 serial; /* urb serial */

13
sound/usb/endpoint.c
View File

@ -591,17 +591,16 @@ static int data_ep_set_params(struct snd_usb_endpoint *ep,
ep->stride = frame_bits >> 3;
ep->silence_value = pcm_format == SNDRV_PCM_FORMAT_U8 ? 0x80 : 0;
/* calculate max. frequency */
if (ep->maxpacksize) {
/* assume max. frequency is 25% higher than nominal */
ep->freqmax = ep->freqn + (ep->freqn >> 2);
maxsize = ((ep->freqmax + 0xffff) * (frame_bits >> 3))
>> (16 - ep->datainterval);
/* but wMaxPacketSize might reduce this */
if (ep->maxpacksize && ep->maxpacksize < maxsize) {
/* whatever fits into a max. size packet */
maxsize = ep->maxpacksize;
ep->freqmax = (maxsize / (frame_bits >> 3))
<< (16 - ep->datainterval);
} else {
/* no max. packet size: just take 25% higher than nominal */
ep->freqmax = ep->freqn + (ep->freqn >> 2);
maxsize = ((ep->freqmax + 0xffff) * (frame_bits >> 3))
>> (16 - ep->datainterval);
}
if (ep->fill_max)