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ALSA: usb-audio: Fix kernel panic of Digidesign Mbox2 quirk 

This patch is based on 3.8-rc1. It fixes two things:
1) A kernel panic caused by incorrect allocation of a u8 variable
   "bootresponse".
2) A noisy dmesg (urb status -32) caused by broken pipe to an
   invalid midi endpoint.

It is also a little cleaner because there is no need for a new
QUIRK_MIDI type as suggested by kernel developers, since the device
follows exactly the MIDIMAN protocol.

Signed-off-by: Damien Zammit <damien@zamaudio.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Damien Zammit 2013-01-04 09:51:44 +01:00 committed by Takashi Iwai
parent 8f7f3ab15e
commit b7b435e81b
4 changed files with 8 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
sound/usb/midi.c
View File

@ -2181,10 +2181,6 @@ int snd_usbmidi_create(struct snd_card *card,
umidi->usb_protocol_ops = &snd_usbmidi_novation_ops;
err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
break;
case QUIRK_MIDI_MBOX2:
umidi->usb_protocol_ops = &snd_usbmidi_midiman_ops;
err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
break;
case QUIRK_MIDI_RAW_BYTES:
umidi->usb_protocol_ops = &snd_usbmidi_raw_ops;
/*

2
sound/usb/quirks-table.h
View File

@ -3015,7 +3015,7 @@ YAMAHA_DEVICE(0x7010, "UB99"),
},
{
.ifnum = 6,
.type = QUIRK_MIDI_MBOX2,
.type = QUIRK_MIDI_MIDIMAN,
.data = &(const struct snd_usb_midi_endpoint_info) {
.out_ep = 0x02,
.out_cables = 0x0001,

16
sound/usb/quirks.c
View File

@ -306,7 +306,6 @@ int snd_usb_create_quirk(struct snd_usb_audio *chip,
[QUIRK_MIDI_YAMAHA] = create_any_midi_quirk,
[QUIRK_MIDI_MIDIMAN] = create_any_midi_quirk,
[QUIRK_MIDI_NOVATION] = create_any_midi_quirk,
[QUIRK_MIDI_MBOX2] = create_any_midi_quirk,
[QUIRK_MIDI_RAW_BYTES] = create_any_midi_quirk,
[QUIRK_MIDI_EMAGIC] = create_any_midi_quirk,
[QUIRK_MIDI_CME] = create_any_midi_quirk,
@ -528,11 +527,11 @@ static void mbox2_setup_48_24_magic(struct usb_device *dev)
#define MBOX2_BOOT_LOADING 0x01 /* Hard coded into the device */
#define MBOX2_BOOT_READY 0x02 /* Hard coded into the device */
int snd_usb_mbox2_boot_quirk(struct usb_device *dev)
static int snd_usb_mbox2_boot_quirk(struct usb_device *dev)
{
struct usb_host_config *config = dev->actconfig;
int err;
u8 bootresponse;
u8 bootresponse[12];
int fwsize;
int count;
@ -546,20 +545,20 @@ int snd_usb_mbox2_boot_quirk(struct usb_device *dev)
snd_printd("usb-audio: Sending Digidesign Mbox 2 boot sequence...\n");
count = 0;
bootresponse = MBOX2_BOOT_LOADING;
while ((bootresponse == MBOX2_BOOT_LOADING) && (count < 10)) {
bootresponse[0] = MBOX2_BOOT_LOADING;
while ((bootresponse[0] == MBOX2_BOOT_LOADING) && (count < 10)) {
msleep(500); /* 0.5 second delay */
snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
/* Control magic - load onboard firmware */
0x85, 0xc0, 0x0001, 0x0000, &bootresponse, 0x0012);
if (bootresponse == MBOX2_BOOT_READY)
if (bootresponse[0] == MBOX2_BOOT_READY)
break;
snd_printd("usb-audio: device not ready, resending boot sequence...\n");
count++;
}
if (bootresponse != MBOX2_BOOT_READY) {
snd_printk(KERN_ERR "usb-audio: Unknown bootresponse=%d, or timed out, ignoring device.\n", bootresponse);
if (bootresponse[0] != MBOX2_BOOT_READY) {
snd_printk(KERN_ERR "usb-audio: Unknown bootresponse=%d, or timed out, ignoring device.\n", bootresponse[0]);
return -ENODEV;
}
@ -660,7 +659,6 @@ static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
return 0; /* keep this altsetting */
}
static int fasttrackpro_skip_setting_quirk(struct snd_usb_audio *chip,
int iface, int altno)
{

1
sound/usb/usbaudio.h
View File

@ -76,7 +76,6 @@ enum quirk_type {
QUIRK_MIDI_YAMAHA,
QUIRK_MIDI_MIDIMAN,
QUIRK_MIDI_NOVATION,
QUIRK_MIDI_MBOX2,
QUIRK_MIDI_RAW_BYTES,
QUIRK_MIDI_EMAGIC,
QUIRK_MIDI_CME,