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ALSA: usb-audio: Fix Oops by composite quirk enhancement 

The quirk argument itself was used as iterator, so it cannot be taken
back to the original value, obviously.

Fixes: d4b8fc66f7 ('ALSA: usb-audio: Allow multiple entries for the same iface in composite quirk')
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2014-11-10 07:41:59 +01:00
parent 48b217aa43
commit 85a8181329
1 changed files with 4 additions and 3 deletions
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7
sound/usb/quirks.c
View File

@ -43,12 +43,13 @@
static int create_composite_quirk(struct snd_usb_audio *chip,
struct usb_interface *iface,
struct usb_driver *driver,
const struct snd_usb_audio_quirk *quirk)
const struct snd_usb_audio_quirk *quirk_comp)
{
int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
const struct snd_usb_audio_quirk *quirk;
int err;
for (quirk = quirk->data; quirk->ifnum >= 0; ++quirk) {
for (quirk = quirk_comp->data; quirk->ifnum >= 0; ++quirk) {
iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
if (!iface)
continue;
@ -60,7 +61,7 @@ static int create_composite_quirk(struct snd_usb_audio *chip,
return err;
}
for (quirk = quirk->data; quirk->ifnum >= 0; ++quirk) {
for (quirk = quirk_comp->data; quirk->ifnum >= 0; ++quirk) {
iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
if (!iface)
continue;